Someone please help me .

I went to India for three weeks and came back with a burning vagina. At first, my doc thought it was vaginitis and gave me antibiotics for that. I took the antibiotics for two weeks and the burning went down to almost nothing. Two days after I had finished my course, burning began to come back. Within the next two days, vaginal opening and vulvar region burnt really bad and was tender to touch as well. I immediately made an appointment with another doctor who after checking me ruled out vaginitis and yeast and decided that it could be a UTI. I gave my urine sample and doc assigned me antibiotics for 10 days. 8 days into the course, I got a call from the doc's office stating that my urine sample did not show any UTI culture and it was 100% clean. Despite that, I finished the 10 day course.

So, I don't have a UTI, I don't have vaginitis, I don't have yeast ...

and once again, after finishing my UTI antibiotic course, I got the burning back. It has been two days since i finished it. There is mild tenderness too which I am hoping wont convert into something as bad as it was last time.

Could it be some worm or parasite that I contracted in India? It can't be a virus (I assume) because antibiotics help subside the symptoms and clear them too ... until I stop taking the meds, that is.

Please give me suggestions. I can't see my doctor for another week because I am on a period and am afraid that this burning is going to get out of hand again. It has already ruined more than a month for me and it's taking over my life!