Is this bad of me?

Hello, so I have been with my girlfriend for 3 years. We are both 19.I was a virgin before I met her and hadn't had many sexual experiences, the relationship sexually started off pretty slowly as we didn't see each other very much. About 6-7 months down the line I was just a young horny teenager and had an idea, one evening added a couple of random contacts from different countries and snapchat them with one intention, a nude picture. We didn't even speak or gain any knowledge of each other! There was no connection with the girls on any level, I never showed them my face, and it only happened a few times. This was all 2 and a half years ago but I worry about it now?? My mind works on overdrive. I never thought doing this was wrong, else I would of had instant regret, like someone would if they had cheated, but this never bothered me until recently. As I do think I have a sort of anxiety.