So last friday i had sex & he cummed in me but i am on birth control & i took a plan b afterwards as well. yesterday i was suppose to start my period & it wasn't heavy it looked more like spotting, same thing for today. My ovulation & fertility window was the first week of this month. I was thinking maybe it's just the plan b messing up my cycle... i'm so curious & i don't know what's going on. any help?? PLEASE