Late?

My period is about 3-4 days late. Last time I “had sexual contact” was December 30th (one day after my period had ended) I didn’t really have sex, the guy I was with finished while I gave him a handjob, & then I tried to get on top but the penis was already going flaccid, but I assume there was probably some semen on his penis (I’d say 1-2 mins went by btw him finishing and me getting on top). Anyway point is do you think I could be pregnant? I’ve been going through a lot of stress since I just started a new job and went back to college so my guess is the stress has delayed it. It’s currently day 34 of my cycle and I usually get my period between days 28 to 33 but what do you think?