Unprotected sex ?!depo shot?! HELP

Jackie

I had unprotected sex today , my bd said he pull out on time but I’ve noticed that as I was cooking , I felt really wet done there , I went to check and it look like if it was cum , very small amount and I did what I had to do obviously pee and clean myself , but I’m concerned bc for the first time I’m getting my depo shot tomorrow , can I still get pregnant ? Or will it affect in anyway if I take a plan b today and get the depo shot tomorrow ? Please no rude comments and I’ll appreciate y’all comments thank you ☹️