I had sex two weeks ago and I was on the last row of my birth control, so it was the placebo pill and the guy used a condom. I m not positive if any sperm got in me or not. A week later I was constipated for about three days then took a laxative and it helped. Last night I had cramps and now I am bleeding very very lightly. You can barely notice when wiping after I pee, but I noticed it. It s very faint. Is there a chance I am pregnant? Also, two days later after the sex, I got my period. But it was very short. Maybe like 5 or 6 days.