untamedbladder, 4-6 times a night is really rough!

I have an incontinent friend with a sleep disorder like yours.
I was getting up 3 or 4 times and sometimes wetting the bed. However, like Texan, now that I always wear diapers for the bedwetting I am getting the best sleep I have had in years.

Sometimes I wake up slightly and realize that I am peeing. At other times I wake up realizing that I have to pee and then immediately fall back asleep. As I am wearing pinned cloth diapers with a booster and the requisite plastic pants on top, it is impractical even to consider getting up, removing the cloth diaper, peeing in the toilet, and then trying to pin it back on again.. I absolutely could not fall back asleep after all that. I guess that aspect qualifies as functional incontinence.
While I cannot recommend any medical solution for your problem, it would appear that wearing a good quality diaper at night would enable you to get more sleep.
--John