Sex in my dorm room

I have been talking to this guy for a month now and we hung out for the second time last night. While we were laying in my bed he looked at me and said "I think it's time we take our relationship to the next level" and I said "What do you mean?" and he said "Boyfriend and girlfriend" and of course I said "Okay." Then we started kissing and one thing led to another and we ended up having sex in my dorm room with people below me and on both sides. I have a room to myself so we didnt have to worry about a roommate. Today when I walked down the hall I feel like everyone knows what we did and are giving me judgemental looks. I have really bad anxiety so that just makes it worse. I also feel like we had sex way too soon. He is 22 and I am 18.