Hi I am a 19 year old woman, I am on birth control and I've experienced some menstrual irregularities. Last month I had some break through bleeding 2 weeks early and then got a light period on my placebo week. Now it is the next month and I have not gotten my period. I had sex yesterday and noticed some blood on the tip of my boyfriends condom. What is going on with me? I am concerned it could be something medical, rather than pregnancy because we always use condoms and I am of course on birth control. Any info. would be appreciated, thanks.