Negative pregnancy tests but had implantation bleeding and other symptoms. Pregnant??

I've had to urinate more than usual also.

(recap) Last month, i had sex around ovulation time (unintentionally). I didnt think anything of it until i started vomiting 8 days later and didnt stop until a week later. The vomiting stopped but the nausea stayed. I also had/have other symptoms such as tender BIGGER breast (they hurt so bad), back pains, fluttering, gas, stomachache and even a linea nigra!! Im not sure if i was already pregnant or i just gotten pregnant but i know my body! My last period was light with no cramps which is absolutely abnormal for me because i usually have to take 3 tylenols when im on my cycle. This month I was 3 days late for my period and my belly is changing shape and all but took 4 pt two weeks ago that were bfn!! Has this ever happened to anyone else?

Update: As soon as husband came back (3 days ago) I started to bleed. It was bright red. I puked all that morning and was bed ridden for most of that day sleeping. It stopped yesterday. My periods usually last for 4-5 days. And during those few days of bleeding, it was quite randomn flushes of blood. I wore a pad and firgured it would be enough for a tampon, but after wearing a tampon for a day, there was not alot of blood on it (Maybe a quarter filled, when usually they are soaked and need to be changed every hour to 2 hours.) The husband has noticed my breasts look larger, and Im having this empty feeling, sort of like in my intestines. I am wondering if it may be possible to have a light period and still be pregnant? Sounds like the likely hood would be no, but... I almost feel that there is a possibility still. Thank You.

Im new to this but just wanted an opinion!! Im on the pill, the one where you dont have a period but i (stupidly i know) dont take it very regular, like i should and im forever mucking it up. About 2 weeks ago i got a light pinkish/browny colour when i wiped and a little bit in my underwear but that was it. Since then i have been feeling really unusual, light headed/dizzy, headaches, achey back, legs and groin area, hot flushes, sometimes sicky at different points in the day and little bit more tired than usual.. I just dont feel normal.. but i took a hpt 3 or 4 days ago but it was negative.. im going to take another in a few days. Anyone else have this?

yes you can have a light period. i know people who have had them throughout their whole preg. I am also having light periods and i still have all pregnancy symptoms. My breast are heavy and all.

@tee

Thanks for your help. I did have some cramping, but they were more sharp and not as deep and rumbly as a normal period would be. Also, it seemed there were tiny clots, but not the large dark ones as per usual. Do you have anything similar clot wise? I took another HPT yesterday, and BFN. So, I don't know.
I remember when I found out I was pregnant with my 6 year old son, I was 6 weeks pregnant and had missed a period 2 weeks prior to testing. Probably not even close to that long yet I suppose. It is so weird that even when I've just had my 'period', I still have this overwhelming feeling of being pregnant. There are many times before where I've thought I was pregnant, but as soon as I get my period, I'd completly forget about it. But this time, wow, constantly in my head, and too many things everyday that remind me (out of the blue). Feeling nauseous once in awhile (especially when I just sit down after work or cleaning), stomach feeling empty an hour after eating, feeling over weight even though I haven't gained any weight, urinating a few more times then usual (noted at work today) and having really bad broken sleep this past week i.e getting up in the middle of the night for a snack and drink :s

Wow thats weird because i also have the tiny clots! Well whatever is going on we might be going through the sam things. I feel very pregnant even with this "period" that i have. I would hate to find out when im 3+ mths!!!

Ya, most definetly would NOT want to find out three or more months later. I'm going to the docotrs office today for a urine and blood sample. Yesterday I had bad diarreah with crazy cramps; once right in the morning and again right after eating dinner. I woke up this morning and wiped light  pink blood, and nothing more yet. I walked into the grocery store today and was grossed out by a really bad stink I just couldn't bare, and then at work I had bad acid reflux that came from nowhere, as I hadn't eaten anything at all by that point, except a drink of milk an hour earlier which should've helped if anything... *(FYI, Im writting all this for my records if and when I find out BFP)*

@PhatIM i looked the bleeding up and i think it may be decidual bleeding where we bleed the first few mths of pregnancy. It imbalances hormones so i think thats why my tests were neg. I almost am positive im pregnant my breasts are getting bigger by the week.I just wish i knew for sure so i can get relief and take precautions

Going back, I just want to say that I forgot to mention that I had stopped all bleeding 3 days ago (Monday morning.) I only bled for those 2 days (starting when I was puking and bed ridden Saturday). And then wiped a smear of pinkish blood this morning. Mind you, I had that Brownish/ Pink spotting a week and a half ago... Basically two episodes of 'period' that were never periods and now nothing... Sigh... To Be Continued... :P

Did they say what happened at the doctors office?

Well, did a urine test. Negative. Blood Test tomorrow, and they'll call me next week if there is a positive. Im stressin out, cause if I'm not, I must have some serious mental issues lol. I will update regardless of how stupid I'll look if I'm not. My boobs arn't necessarily hurting, but they feel diffrent.

Well as i read about the decidual bleeding it throws hormones out of whack so the urine test may be negative because of it. I still have not went to the doctor yet because of my schedule but im hopiing to make it this week :/.

Alrighty so my last period was on 9-28-12. My partner and I had sex from the day i got off (10-2-12) twice a day usually and just used the pull out method. Around 10-16-12 i got a very light "period" even though it was 2 weeks early. But the blood was super light and brown and sometimes pinkish tent color. There wasnt enought to fill a panty liner. My normal periods are very heavy and last like 6 days. This lasted about 4. And then came time for my real period to start (10-28-12) and nothing. I still havent gotten it yet. I took two tests and they both came back negitive. Im so confused. What do yall think?

Well you could've had ovulation spotting or maybe implantation bleeding. When did you take the tests?