White ring on my gum, what is it?

[Starrynights]

I developed problems with my tongue around about June last year. I initially started getting what appeared to be lie bumps, but then th condition worsened to a white tongue and pain and then late last year, this ring on the inner of my left gum. I Do have a small white area on my right side too, but it isn’t a ring. I also have white rings like this on my tongue (not the white patch on my tongue). They have been a bit yellow ish in the past.

I am not sure if I have geographic tongue, oral lichen planus or oral thrush. I don’t know what to do. Been to dr several times and oral specialist has denied me saying it’s geographic tongue but I’m in pain and it doesn’t seem to look like geographic tongue. I am unsure if geographic tongue can even on the gums as well? I’ve had two oral swabs done which showed no signs of yeast and tried many drugs for oral thrush (nilstat, decozol, flucanazole, daktarin, fungalin-which helped my white tongue oddly and then it came back again once stopping and oil pulling) to no avail. I believe more thrush To be my problem, because at one point I had angular chelitis and red rashes on my legs. The red rashes were cured with flucanazol. This made me think it was thrush?