Am I just being paranoid?

My period isn’t due for 3 days but I saw my boyfriend a couple of weeks ago and that was supposed to be my fertile week but I was sick the week before so I don’t know if that had any effect, anyway when I saw him I gave him a blow job and afterwards he ate me out and didn’t really finger me but had his fingers around that area while eating me out I don’t think he had anything on his fingers and he said he didn’t, I don’t know if there’s anyway his semen could’ve gotten on the shirt I was wearing and got near that area. Is there any possible way I could get pregnant. Last week I had cramping and some headaches (which could’ve been from stress) but other than that I have had no symptoms of my period coming or anything