help advice on vaginal lesion

[plainmaryjane]

I went to see an  OBGNY because i had a lesion on my vaginal lips..it was red NOT bumpy looks irritated. She mention it may be herpes. she didn't prescribe me anything because the virus was going away, but she took a sample of the virus and took blood from me. I did a full STI test and everything came out negative. the collected sample came out negative for herpes. I got a UTI went to an urgent care got prescribed Ciprofloxacin went to an OBGNY again cause i had a heating sensation when taking the Ciprofloxacin again I did a STI screening took urine sample and Nitrite was detected as well as Leukocytes but i was already treating for the UTI again everything negative. The lesion returned again in the same spot I went to the OBGNY they took a sample of the virus and i was prescribed fluconazole 150 mg and nystatin-triamcinolone 100,000 unit/g-0.1 % topical cream again i was told it may be herpes. Hyphae/Candida was detected. And now again i have a lesion on my outer vagina lip in the same spot reddish and looks irritated like it was scratched and i'm worried. What could the lesion be? do i really have herpes? is it a reaction? I'm tired of going to the doctors about it i want to know what it is