My cycle did come on while I was taking the
antibiotics, but I did have sex one day before it started,
and my
period was about to come on anyway. Is there a chance that pregnancy could occur under those circumstances? I know antibiotics can affect birth control, and I have read that sperm can stay active for about 5 days in a woman’s body, so those are my concerns if the antibiotics affected the birth control that was in my system after having a possibility of sperm still there.