I’m Concerned

So recently (by recently I mean yesterday) I acquired a fuck buddy. He came over and we had sex 3 times back to back and he pulled out all 3 times. I had showered before he got here so I was clean and everything and I went pee after he left. I was going to shower after he said he made it home okay or whatever but I dozed off and didn’t wake up until this afternoon. I had errands to run so I didn’t have the time to take a shower. Now I’m kind of itchy and sore down there. It kind of feels like a yeast infection and it also kind of hurts when I pee, kind of like a UTI (which happens anytime I have sex, it’s been that way since I lost my virginity) so I was thinking and I heard somewhere that sometimes having sex can throw off your PH balance. I’ve decided to drink water and take my cranberry tablets and use some yeast infection cream for now and if the symptoms persist I’ll go to the doctor and get checked. Any advice? I’m a little worried abt it. I don’t think I have anything I just think it’s Bc of the fact that I didn’t have the chance to shower after the fact and Bc he was “larger” than I’m used to, but I would like a second opinion.