I used to have 7 days of bleeding with the last 2-3 being light but consistent. Since I started being sexually active about 7 months ago, there has been a noticable change. After about 2 months, the first 2 days have been very heavy, the third tapers of like the last 2-3 days from before and then for it generally stops (to the point that I can go without a tampon and maybe one time at some point over the next day or 2 have only a little blood appear). My boyfriend and I had unprotected sex while I was "on my period"-really the 5th day since the start and I hadn't experienced any bleeding for about a day prior to it and did not after either (yes, very unintelligent but we had just gotten back together and were both trashed and he says he pulled out but I honestly don't remember) and a couple of weeks later, my breasts have become very tender-unusual for me at any time-I have been having dizzy spells and some nausea and extreme sensitivity to certain smells. I had some mild cramping a few days later but not again since then. I have had some trouble with low blood sugar episodes and have had 3 UTIs following sex, one of which followed this particular event. I am not on birth control and have never gone to the OB/GYN (I have now made an appointment) and I am becoming a bit concerned. Any thoughts?