I have been on the birth control pill for a few years now. This past month I have had sex twice. There were two different occasions where I didn't remember to take my pill until the day after. I had sex the day before I usually get my period, but the condom slipped and just to be safe I decided to take Plan B. It's been 3 days now and I still haven't started my period, and I am really nervous about it.

I have not shown any other signs of pregnancy.