Pregnant?

Hey guys so basically this is what happened:

I had sex on the 25th and we took the condom off in the middle of it but he wipes his precum off and everything. it only lasted for a few seconds and we put the condom back on, but he didn’t cum in me. My periods aren’t very regular but they’re not crazy irregular either. 35-42 days i would say. but i didn’t take a plan B and i’m not on birth control. I was supposed to get my period on the 29th but then the app changed it to the 1st of august however, i still haven’t gotten it. I don’t know if it’s bc i’m worried about it or bc i’m pregnant.

please no rude comments, i’m not able to take birth control as of right now. i know if i don’t want a kid i shouldn’t have done it, we all make mistakes. i just need some help, i don’t have anyone else to talk to.