Hey, I was in the same boat you are. About three years ago the same thing happened to me. I agree about waiting the fourteen days, and I definitely agree that you shouldn't get freaked out if your period is missed.
Thankfully I was not pregnant, however I did miss my period for three months after due to the intense stress I was feeling.
As far as what to do about the rape, if you feel like you want to go to the police or not is
completely your decision. There are many reasons why women do, and often times it empowers them to face their accuser, but don't let anyone make you feel bad about whatever you choose. Although to everyone it seems daft not to report it, it's a whole different ballgame when you have to actually go through with it. I wish you the best of luck, and if you ever need anyone to talk to, you're more than welcome to
PM me. I wish you the best.