I'm Not Sure What's Going On. I've Been To The

I'm not sure what's going on. I've been to the doctor 3 times sand each time I was treated for a yeast infection that I don't have. I was tested tested for gonnorhea and chlamydia and the test came back negative. Bacterial cultures were also sent out and they came back negative. I still feel irritation and itchiness and I don't know why :(