Help!!

I just had sex but the condom broke!!! I'm almost 18 but I don't want to have any kids yet and I'm not sure if I should get a pregnancy test in a few days because I'm not sure if I'm fertile/ovulating. New to this app. What should I do?!
UPDATE:
I' went to pee and when I wiped my self I was bleeding and not period blood bleeding like just bleeding idk how to explain it and also within the last week I've been having to go "pee" every few minutes and it's not even a full pee it's more like a sprinkling of pee and I don't have any stomach pains bc I know what a uti feels like I've had one. Any ideas what might be going on?! 
P.s: I don't have insurance until next month