Broken condom...

So me and my friend have decided to start a friends with benefits thing, and tonight he came over for the second time to have sex. It was great and lasted forever, but after he was done he pulled out and noticed the condom had broke. I just finished my period today.

I want to go and get plan b, but im just hoping that my pharmacy will give it to me as im only 16. Do any of you have any advice for me??? Please.