What to do

So before I start I’m going to say that I’m completely free of any STD and STI because some of y’all automatically assume that every time. My boyfriend and I had sex 3 times on Saturday not back to back but randomly throughout the day. I’ve been super sore lately down there which is normal for me. I produce a lot of “wetness” so I know that’s not the problem. Lately I’ve noticed it’s a burning irritation sensation when I pee and only when I pee it’s nothing else. No itching or weird smells. Any ideas on why it could be?