Could I be pregnant?

I'm just gonna apologize now, I don't have any exact dates for anything and this is a dumb question. I have always had an insanely irregular period, so that is probably the case. I haven't had my period since sometime between October and November, and a little while ago I messed around with my boyfriend. We didn't have sex or anything. His penis didn't go anywhere near my vagina. I used my hand and rubbed him to mess around and there was a lot of precum. He says he peed before anything and wasn't close to cumming. I also tried my best to wipe off my hand before going to the bathroom later. Could I be pregnant?Like I said before, I know this is really stupid but when you don't have your period for this long you tend to freak out.