i was having unprotected sex with my boyfriend, well i was two weeks and a couple days late. today i started period but it was very light and now it has almost completely stopped. i have taken hpt and they have all been negative i also did i blood test about a week ago and it was negative. two weeks ago when i was supposed to start i had brownish spotting, i have been feeling more bloated, and have been exhausted and some what nauseous, and my boobs started hurting about 3 days ago. any suggestions of what this could mean?? please help me out ladies