What is wrong with my Vag! Please help

started with an itch, went to the doctor and ive been on Flagyl and diflucan. Both not much help. Still have an itch that likes to hang around here and there. Ive had a full std panel done. Negative for everything including Bv and yeast infection. this has been going on since march. ive been perscribed some cortisone cream which provides relief. But im starting to get worried.

side note- the name of thw cream i was given was clobetasol propionate 0.05%