Hi Jerry as far as the pre diabetes situation , I have been on metformin for years for P.C.O.S. so that dose was just doubled from 1000 to 2000mg a day 1 am 1 hs. I am guilty of not using my cpap machine then again the depression and med problem was long before that.I had a neck injury so the constant pain for ten years has interfered with sleep regardless.I do take the thyroid med at night .I will try changing to am its a very low dose 50mg total can hurt.I also take 1000mcg -12 nightly for the last year (Metformin can deplete those levels over a couple years time) something my endo came upon not my primary who put me on it originaly back in 1998.
I did have a proper sleep study that did indicate a need for a cpap at a very low titration probably due to some weight gain over the last 3 years ,my sex drive has never been an issue (when I have a partner).

my endo checks my thyroid like once a year sometimes twice because I complain of the extreme fatique,weight gain without reason my eating ,activity etc. has not changed and 4 out of 5 times it comes out right at the lowest end of normal range and that other one time right below so not sure on the thyroid.And she checks cortisol every couple years after finding a benign tumor on my adrenal gland unchanged for 5 years now.I am just a walking mystery ,who wants to feel halfway normal someday