Okay, I'm pretty new here but I need advice. I've just been forced out of the closet to my entire school

I began coming out to as gay to my group of close friends, this was to get an idea of how I should expect people to react and to practice for the big one (my parents). Anyway my group of friends new but one of them began telling their friends (I don't know which one did it but I have my suspicions) and then they told their friends and seeing as my school is a large hoard of nosey cunts everyone (about 180 people) found out within 3 classes (2 hours). I was greeted by a guy who is normally an asshole to me shaking my hand and saying that he accepts me. I've had barrage of questions and mostly made comments to get out of them. I hate this, everyone is going out of their way to be nice to me, everyone wants to be the one who was accepting straight away, everyone wants to prove how nice they are. None of them gave a shit about me 2 hours ago, I went from happily sliding along being the shy one in the back of class to being a fucking subject that everyone needs to be extremely careful around so they don't offend me or come across as an asshole. I fucking hate it. So that's bad enough seeing as I wasn't planning on everyone finding out, ever, but now it's even worse because my brother goes to this school and I'm pretty sure he knows, and since no one knows what a fucking secret is around here he's probably going to tell my parents. I was planning on coming out to my parents/family in maybe a year or so when I've become more confident and comfortable and didn't have as much stress since I have exams in 3 weeks but now it looks like I'm going to have to tell my parents over the next few days. I'm scared, I'm embarassed, I feel so vulnerable, I'm stressed to fuck and all I want to do is scream and pull my hair out. Please, someone, tell me what the fuck I should do