After Sex Problem

So I had sex last night and it was amazing. But ever since then I needed to pee but when I try to only a tiny amount comes out and you feel like there is more but it won't come out. It also burns as it comes out. I am really concerned as it was only my second time and I don't want it to be ruined. He used a condom. I know it can happen straight after sex but it is almost 12 hours after the intercourse that I  having trouble. Can anyone share some light or reassurance on this problem. Or should I just go and see a gp.