white coating inside vagina

Babes

I have been having trouble with this for the LONGEST TIME. I have been tested for everything multiple times, but I always get negative results for them. I have tried boric acid and it goes away for a few days then comes back. The coating is only on the inside and I am tired of it😩😩😩. Does anyone seem to have this problem as well??? Can anyone help?? The gyno I went to was literally no help!!!!