Sex life

Hi I’m 19 and I got out of an 8 month relationship like two months ago and it was a bad relationship I definitely was over it before it was over but anyway I went on a date with this guy two weeks ago and god I really like him and we went on a second date it feels so good it feels like nothing I have ever experienced in my last relationship like I feel this spark whenever we kiss and it just feels amazing and we hung out last night and I thought I was ready to have sex with him but I started second guessing it and before I said anything we were already doing it but during it it was okay it felt good but he was Ik this is tmi but he was bigger than all of my exes and it hurt and I talked things through with him of course I would say it hurt and whatever but after sex I literally wanted to cry and I don’t know why I think I felt ashamed but I know that I’m 19 he’s 19 and if we both want to have sex then have sex but I felt so ashamed and idk I just wanted to talk about it with someone and not be judged he asked me to be his girlfriend later on and I don’t think I’m ready for that yet I just want to make sure he’s not a rebound because he makes me feel really good so we agreed to wait a little longer…