(Posting this in multiple groups for more advice)

I had sex on 11/15, with a condom. I put the condom on upside down though, so when I flipped it over there might have been precum on the side that went inside me. He did not finish inside me, he pulled out like five minutes before he finished and I sucked him off and he came in my mouth. My period is 5 days late, but I have also been very stressed lately because of school and family issues. Can someone please tell me the chances of me being pregnant?