A few days ago, I was notified of my degree award, and my imposter syndrome kicked in - trying to see if I've done anything to not warrant earning it. I found myself looking through good academic practice guidelines and noticed something I'd previously overlooked -- that it was considered exam cheating to attempt to look at another candidate's exam paper even if nothing was gained from it. I'm pretty sure that on at least one occasion I've looked at another person's script while they were taking an exam. To be honest, I have no clue which exam(s) I would've done this on (although I know this wasn't a very common behavior of mine) and, again, I've never been able to benefit from it as I've never been able to actually read anything from anyone's papers (My conscience wouldn't have let me forget this) -- so all my work on my exams are my own knowledge and not gained from anyone's scripts. I also can't remember precisely if my intentions in doing so were to try and get answer from him/her or to see which part of the exam script they were on to judge whether I was behind or not and should pick up the pace (although there must've been some instance where I actually tried to get an answer but couldn't make anything out) - I just have a feeling that I've looked at a person's script before and specifics are pretty hazy.
What should I do about this? My friend told me that he himself and friends he knows (who I know as well and are high achieving students) have been guilty of this and most students are and that this isn't a big deal. I also fail to recollect when this would've happened, and how often (although it couldn't have happened more than a few times as I think I would remember an incident more clearly if it happened more often). Should I tell the college about this, or take it as a learning experience and move on? Part of me doesn't want to penalize myself if this is a fairly common thing, and I worked very hard to get the degree award I have.