I'm in super deep ****?

Nothing much you can really do at this point except learn from this & hope that she doesn't call your mom. If her parents & yours were somewhat friends, it is likely they may call. If they're not, she probably wont call your mom but she wont want Sara to hang out with you anymore. If your parents find out you'll just have to deal with whatever punishment you get & stay on the straight & narrow so you can earn their trust again. If they don't find out, you're going to feel really awkward for a while, & your mom may wonder why you guys aren't hanging out anymore. Be careful what you say on Facebook. Many teens experiment with sex & drugs and still come out ok, but it is NEVER a good idea to talk about it on Facebook, period. Even over the phone is kinda sketchy. Be careful with your personal business, and your life in general.