What’s the likelyhood of becoming pregnant if I have my

Bf a blow job swallowing his c** and then kissing him, after 45-1 hour he went down on me? Can his sperm go form my mouth to his and then inside me? To get me pregnant. Ik it sounds stupid but I’m 2 days away from my fertile window I realized and I’m really freaking out rn. It’s all I can think ahout, I have really bad anxiety which is making matters worse. Idk what to do, I’ve been reading stuff on google which just made me feel worse.