Condom broke + Plan b Help!

I need some advice! So recently me and my boyfriend had sex on dec 10 like 3/4 days after my period completely stopped and everything was fine but the condom broke. He pulled away immediately and we didn’t finish because I wasn’t on birth control. So on dec 12 I took a plan b before the 72 hours. I know I shouldn’t be worried because I took all the necessary steps but I can’t help but feel a little anxious and stressed. I would really appreciate some advice and reassurance. Btw according to glow I wasn’t ovulating either. Please help thank you very much!