What is causing this weird, annoying sensation?

It began early march where I one day felt this feeling inside of my mouth, like having a hair on my tongue or like a small crunch that wouldn’t go away. I brushed my teeth and did everything you could possible imagine but the feeling wouldn’t go away. But five days later it did.

It was gone until mid may when it came back. The feeling can sometimes sit on my tongue, sometimes under it, sometimes at the inside of the right or left cheek. It switches places constantly. Sometimes it can be gone for hours, and if Im lucky it can ge gone for the entire day. After having it for three weeks this time it went away for a week.

Then it returned once again in mid june and has lasted til this very day. What could this possibly be? I am brushing my teeth daily, gargling water with salt and everythig you can think off…still the sensation wont go away. I have also looked into my mouth with very good lightning and there is absolutely nothing there.
As Im typing this, the feeling sits on the back of my tongue on the right side.

Thanks in advance and much love.

I dont under under which category to put this, but since its my mouth I choose oral section.

did you ever find an answer to this? or have you cured it? I am suffering from the exact same symptoms and its driving me insane!