Pregnant or in my head?

(Sorry this is long) Okay.. So I'm nineteen and I dont know anything about pregnancy - I just know something is different (wrong) with me. I lost my virginity to my now ex boyfriend -who was apparently playing me- and we had sex three times (once on Oct. 3 and twice on Oct 5) when our only method was pulling out (stupid? I know.). Well, I don't know how well he did it but I know it's still possible. Anyways, I went to planned parenthood two weeks later got tested came back negative so I waited until I got my period. Well, I experienced bleeding but it wasn't like my usual period - which are really regular. Anyways mine usually only last 3-4 days with heavy bleeding on the last two days and medium on the first two and REALLY bad cramps and clotting - well this time around it was really light with unnoticeable to no cramps and no clotting and I don't know how long it lasted, I barely noticed, that's VERY abnormal for me. Maybe i got a lucky period but i doubt it. So I got two home pregnancy tests and I took one this morning (10-28-12) and unless I did it wrong (which is possible) it came back negative. I guess it's surprising because I have this weird feeling that I'm pregnant, like an instinct but every test that says negative makes me "relax" but confused. It's not that I want a baby - I want to go to college next fall to become a counselor and be married or at least a really good relationship with someone first but I just feel... Weird and I've never felt like this before. I didn't think much of it until I googled how I was feeling and pregnancy came up. Let me just talk about that for a second; I have: headaches out of nowhere (and they hurt!), leg cramping, neasea(but no vommiting yet), hungry and tired more often, have to pee more, I got sick just smelling one of my favorite foods, I craved something weird (toast with peanut butter and full green olives on it) like a fluttery feeling in my uterus. I'm more moody (I get angrier easier) and more emotional, my breasts have been tingly and feel bigger, I'm only comfortable in certain positions(like from back aches) and in certain clothes, and my back hurts and I think that's it- and i googled AFTER so i couldnt have just magically thought all of those things right? Anyways, the only PMS thing I have is cramping, a little moody, and sometimes dizzy but that's it so it can't be that and I'm not stressed - I actually feel like my life is coming together and I don't care about my ex so I'm not stressing over that. I mean, I'm kinda in denial that I'm pregnant and if it wasn't for how I was feeling I wouldn't even consider it. I have no health insurance so I can't just go to the doctor. I know it's possible to experience bleeding and get negative results for awhile but I just want to know so I can figure things out and take care of me and a baby. I hope I don't sound stupid - like I said I don't know anything about it, I just feel pregnant and weird. I'm not used to any of this and I just don't know what to do. I'm quite small and have a really high metabolism so if I grow more noticeable I guess that's something. I just don't know what's going on and I'm scared because I've heard of people who NEVER knew they were pregnant (still got periods and stuff) and I want to be prepared.. I heard it could be my virginity but two-three weeks after to have bleeding is crazy isn't it? I heard you just bleed very little and i didn't like at all (that I know of) I just want to know what people think so I can just be done with it and not worry about what I do or prepare myself. Should I wait a couple of weeks or a couple of months? And my parents knew before but if I talk to them they'll just yell at me and assume I want to be pregnant and "ruin my life" with a scumbags baby- but I don't. I'm just really confused... and need help. Also, I dont know how this site works so if I don't reply or anything please forgive me. I just did some "research" here. I don't even know if someone will see it. Thank you for your time.