I had unprotected sex with a girl exactly a week ago, and ever since then, I've been experiencing pee burn and frequent urination. The tip of my penis is also red and irritated. I had tests done for STIs as well as for UTI and yeast, but all came back negative. Yesterday I developed a fever of 102ºF so I have no clue what's going on. I went to the walk-in clinic again today and the doc said the fever is probably unrelated but didn't give me any other advice, just made me do another urine sample. Does anybody have any ideas on what might be going on? Kidney stone, random urethritis?