I have been on birth control for almost 3 months now. My boyfriend and I always have unprotected sex and he does cum in me. I started what I think is my period 3 weeks before my birth control says i should be on my period. Normally I bleed for 5 days then I'm done but I was in school today and started bleeding again. Some days it's really really light and some its heavy...What does this mean? I heard you can still bleed while your pregnent. I have four more pills till It shows I should be on my period.