Broken condom

Okay so last night me and a guy were grinding and I told him to wear a condom just in case. We didn’t really have sex, it was more just us rubbing genitals. his penis may have entered a tiny bit but barely. Anyway, towards the end we noticed his condom broke. We stopped and he came away from my vagina. My Vagina felt a little wet after but that could just be my own fluids. Regarding if the pre-cum contained sperm, he said he didn’t cum in 24 hours and peed in between.

This happened less than 24 hours ago and I want to know if I should go out right now and buy Plan B?

I’ve never taken it before and I’m scared how the hormones will affect me.