UTI or Irritation??

I know that either is likely in the case and only time will tell, but I would like some input. So last night, I had sex with a guy and I haven't had sex much the past few months. We went a long time and he was rough with it. I made sure to pee afterwards to rid my tract of any bacteria. It burned last night while peeing immediately after. I assumed it was just irritated.

Now, today I am in extreme discomfort and it feels like a UTI. If it keeps up, I will go to the doctor. But, I feel that sometimes the irritation will go away after a while... What do you think?