Implantation bleeding??? (very detailed and.. graphic)

Okay, so I'm going to be very detailed in this so just bare with me please. Without realizing it I've had sex 4 times within my fertile week. I've been keeping track of my periods on mymonthlycycles.com since April.. there were a few months where my period was off.. but that was due to another pregnancy scare (I'll learn one day) and ever since that one month I've been normal. The site averages my period at 31 days, but looking at when they start they're really around 28-29 days. Anyway, according to the site, my periods, and their ovulation calculator I started ovulating on November 22nd or November 26th, depending on if my cycles are 28 or 31 days. I had sex on November 22nd, November 25th (twice), and again on November 26th. I also had sex on November 29th, but I don't think that was still my fertile period. Each time I had sex we didn't use any form of protection (yes I know) aside from the 'pull out' method. Now when I say this I mean he would pull out and finish himself off, although he wasn't very good at aiming his stuff away from my vagina. I think the first 'symptoms' I noticed were on the 29th/30th. After we had sex on the 29th and I went to the bathroom there was some brownish blood when I peed. This is what sparked the 'oh c**p I could be pregnant' thought. I didn't really think much of it though b/c we did just have sex. Also that night is when my boobs started to really hurt. They were very sensitive to touch.. and just got worse as the night went on. I was also having weird (I don't know how to explain it) sensations in my stomach around my belly button. The next day (November 30th) my breast were EXTREMELY sore and all I wanted to do was sleep all day. In the past few days I think I've had every pregnancy symptom possible.. although the headaches are common for me, and some of the others may just be in my head. Now for the things that are really sticking out for me. The increased hunger.. I usually only eat once-twice a day b/c I'm never home. In the past few days I've been nauseous if I don't eat, and it seems like I'm starving again after eating a couple of hours b4. Another thing, I'm not due to start my period until December 5-9. The first day of my period is usually horrible for me. I can always tell the day b4 that I'm going to start, and that first day I'm doubled over in pain. Last night I felt something that I would call 'tugging' in my lower stomach and this morning I woke up bleeding. The bleeding has been very off. It's not flowing.. only there when I use the bathroom.. but it's more than a spot. There was one time when it was heavy, but I've been shopping all day and I was doing a lot of walking. Since I've been home there has been no 'flow' to it. I've had a pantie liner on all day, had to change it once after shopping. The blood is red, but watery looking. I'm having very little cramping, almost not noticeable. The not cramping is really odd for me, and another thing that's got me wondering is that there is no smell to the blood. I don't mean to gross anyone out here, but we all are women and I'm sure we've all experienced our periods. I have a very distinct period smell and can't recall any period I've had where I couldn't smell it when I went to the bathroom. I guess I'm finally getting down to my actual question.. could this be implantation bleeding? My breast are still really sore.. I'm tired.. and my eating habits.. I feel like a pig and I have constant hunger pains.. it's really weird. I also have a disgusting taste in my mouth, but I don't know whether to consider this a pregnancy symptom or associate it with the fact that my wisdom teeth are breaking through right now. I'd really just like some thoughts and opinions on all this. I'm probably just stressing myself out about this when I shouldn't, but things are just really off this time. I'm going to wait and take a pregnancy test next week. I'd really rather not spend money on those things if I don't need to and I'd like to see if the bleeding gets more 'normal'. Thanks in advance for any help.

Kasey