Little make out slip up with my girlfriend

So for context myself (17m) and my girlfriend of 2 months (16f) are eachtohers first real relationship and I was invited to her house for dinner. After dinner we went to her room and started making out while watching hunger games lol. It was getting a little heated and we were lying on our sides facing eachtoher and I went to put my arm over her and squeeze her shoulder and may have mistaken a tit for her shoulder 😬. I probably didn’t realise what I was holding for two seconds in which she stopped kissing me and then I realised and said “wait is that not your shoulder?” And she laughed a little and said no and I apologised maybe 5 times and she said it was fine. That was last night and it is not 1pm and she usually messages or calls me at 8 or 9am so it is obvious that she is kind of avoiding talking to me and I don’t know how to feel or what to do. I also was kissing her neck while she was laying down (we had talked about doing this before and she was doing it back) and she was kind of sighing or breathing heavily while I was doing it to her - I don’t know if this was a good or bad sigh lol and am thinking she might just need some time to process what had happened. Please help 😅