M.R.
How old are you guys?
If shes not pregnant, she will get her period, probably on time. If she is, then she wont get her period.
If shes scared to be pregnant, maybe practice safe sex???
ETA- Jeezus, I feel like I'm teaching sex ED here. Ok, too bad BC made her gain weight, what does she think a pregnancy is going to do? Also, BC doesnt prevent STD's. How about a condom?