Why am I still hurting when I had sex 2 days ago?

My boyfriend and I had sex for the first time together 2 days ago. He didn’t use a condom but he didn’t go all the way because we didn’t want to take too much of a risk of me getting pregnant. While we were doing it, it hurt but I wasn’t excruciating pain or anything like that. After we had sex, I went home, I wasn’t hurting too bad I took a shower, cleaned up and I was still bleeding a little bit. And I figured that was normal since it was my first time having sex due to the tearing of the hymen. Today, I’m still hurting, it’s a bit more bothersome than it was yesterday or the day before. And I noticed today too that I can’t hold my bladder for a long time anymore and when I DO urinate, it burns really bad. Even when I’m just sitting down, it feels uncomfortable down there, like I still need to pee, and it still burns just sitting here. Could it be that I have an Urinary Tract Infection (UTI)? or is it simply because I just had sex for the 1st time a couple days ago? Please someone help me, I don’t want to wait too long if it’s something serious!