Im on the birth control, Yaz and im on my 3rd pack of pills. recently i got hurt so i was put on an antibiotic and the dr. said it would lessen the effect of the pills. this happened about 2 weeks before i should start. I did start and then about a week after i started my fiance and i had unprotected sex. How long does it take for the antibiotic to get out of my system and the pill to work correctly? we have had sex a couple times and twice were unprotected but he pulled out before ejaulating. Every month i worry extremely bad, because thats just how i am, i worry about everything. but lately, a couple days after the unprotected sex, my legs have been aching and every now and then my stomach kinda feels like its cramping. do i have anything to worry about? im still not supposed to start for about a week and a half but im very very nervous! is it all in my head or doi have anything to worry about???? i dont know what to do!! PLEASE PLEASE HELP!! :-(