Help kinda worried

I recently stayed with my boyfriend at his house. I’m not currently on birth control so we just stick to blowjobs and other things. Anyway, we were in the middle of making out and I took off my pants and he took his off and then I gave him a blow job and he ate me out. When I was done I couldn’t figure out if some of my discharge came out of me or his sperm was on my thigh we have never had sex. I’m freaking out because my period hasn’t come yet and it’s supposed to come very soon. I’m sorry for the tmi thank you to anyone who can help calm me down. I’m just a very anxious 20 year old!