I’m not questioning your sensory perception, as I have similar issues, including multiple sleep disorders, but asking out of curiosity - does your brain interpret [in your mouth] as [touching your face]?

Asking because my brain differentiates the two, so while it took a week or three of practice before I could keep it in all night, I eventually learned to sleep with a tooth guard in place. My sleep improved after that because apparently the jaw alignment helped with some breathing issues/apnea. (But trying to sleep with the face mask for a cpap machine was a no go.) Obviously ymmv!

Anyway, I find how brains map things to be fascinating. :)