PLEASE HELP Y'ALL

Blair • My momma and little brother are my guardian angels🦋💛
Ok I had unprotected sex yesterday and he came in me, I'm on birth control though. Today when I wiped this was there. Is this something I should be concerned about? I also currently have a UTI so idk if that could have something to do with it too. Please help. I need to know if I need to go get a plan B.