Slight burning when peeing

Bre

I had unprotected sex yesterday and today I noticed a slight burning when I peed. I had unprotected sex with the same guy a little over a week ago and it didn’t burn when I peed after. It was only my second time ever having sex so I don’t know if it’s just raw down there or if it’s possible that I have a uti, yeast infection, or possibly an std. Help!