i recently started taking antibiotics(pennicillin) for stepthroat and ive been on the pill for 3 years on and off. i'm towards the end of the active pills (the placebos start tomarrow) and earlier this week i started getting slight cramping, not as bad as the cramps i get on my period, but normally i don't get any cramps during the active pills. after having the really minor cramps i went to the bathroom and noticed i had spotted quite a bit. earlier that week i had unrpotected sex with my boyfriend. he never pre-cums at all, and when i wasn't on the pill before we used the withdrawl method and i didn't get pregnant (he has really good knowledge of his body). i've been on antibiotics and the pill before, and i know they reduce the effectiveness, but i've never had cramps before while on them. i also forget to take the pill within a few hours of the previous time after being on antibiotics. i guess what i'm asking is why i got cramps and had spotting? is that normal, with antibiotics, and i just got lucky last time and didn't have them? or does it mean that i got pregnant and had a miscarriage? or that i still am pregnant? i'll know in a few days when i get my period (or not! *knocks on wood*) if i'm pregnant or not, but it'd be nice to know if this is something i should expect from antibiotics and the pill... thanks so much!