Chance of pregnancy

Okay so I still have never had intercourse and my period is about 10 days late but I'm very irregular and sometimes my cycle can go up to about 40 days and I currently am still waiting on it, but me and my bf were fooling around and were both naked and humping on each other and he did finger me a couple of times. Is there any chance that Precum could have gotten in some how? I think I'm just over stressing about it because his Penis did not go in all the way at all so.. we didn't have sex. Am I just over stressing? Lol