Please give me your opinion ladies 🥲

Okay, so I slept with a guy who has a ton of bodies and he was only my third. He didn’t tell me until after that he took the condom off. I got scared and went and got STD tested like four days after the fact. Now, everything came back negative but flash forward to now it’s been about a month since we slept together and suddenly my girl is feeling itchy and stings. Could a test have been wrong or done too early? Should I just assume it’s a UTI or something? What do I do🥲