Day 4 of period

Hellooo I'm just curious as to what are the chances of getting pregnant if you had sex on day 4 of your period?? We didn't use a condom but he didn't finish in me.

From the articles and stuff I've read its very low but I just need clarification because I'm lowkey freaking out hahah because it was way before my fertile period, and I know that sperm can live up to 5 days and then they die 🤷🏼‍♀️

I will also note that I've been having some cramps and weird stomach pains?? Should I just take a test? Better safe than sorry?