Ambien is designed to help people fall asleep but it doesn't always address sleep maintenance insomnia very well...meaning the bulk of its sedation properties fade away after 2 or 3 hours. There is a CR version...controlled release available.
All the meds you take to help you sleep also have a sedating side effect for possible drowsiness symptoms the next day.
Hangover effect sort of. Benadryl being probably the least depending on how your body metabolizes it.
But since you have extreme sleepiness even when you don't take the meds...probably can't blame it on the meds.
You might try taking earlier to lessen any hangover effect that might be a factor.
Remembering the dreams when using a mouth guard and not when using cpap doesn't really mean all that much. Not like people might initially think anyway...People think that if they don't dream remember them then they aren't getting into REM sleep and that doesn't really mean that. It's said that we don't remember dreams if we sleep soundly...it's when we wake up during a dream or right at the end of a dream that we remember them. Remembering the dreams when using a mouth guard could simply be from waking often.
5 hours of sleep...not nearly enough even if it wasn't fragmented with multiple wake ups.
Fixing poor sleep is easier said than done unfortunately.
Google "sleep maintenance insomnia" and "good/bad sleep hygiene"...see if you happen to have any bad habits that could maybe be improved upon in an attempt to improve your sleep quality...hours of sleep and reduce the awakenings.
I suspect that stress is playing a big part in the problem...both in how you feel during the day and your sleep quality.
Nasty little circle it creates...feeding off each other.
Google "fatigue"....stress alone will do it....not to mention the short hours of highly fragmented sleep.
Instead of rotating the meds so often...try one for a week...then try another for a week.
Talk to your doctor about the situation.
The low testosterone could also be a small part...I don't think it is the sole cause for your problems. Most often in these situations it's a complicated problem with several factors involved.
Talk with your doctor about maybe adding Amitrypline 10/20 mg as an evening med. It's a very mild antidepressant which has been used for various other issues...10/20 mg isn't nearly enough to be therapuetic levels for depression (those levels will knock an elephant on its ass) but in very small doses like 10 or 20 mg...they can help with getting to sleep and staying asleep. Don't take it late in the evening though...it packs a punch in terms of hang over effect for some people...like around 9 PM.
I take it for my sleep maintenance insomnia....for me it works a LOT better than Benadryl and about as well as Ambien but without the ugly side effects or potential addictive properties of Ambien...I have never used Trazadone so I can't compare it.
There is a book that I suggest you get and read. Sound Sleep Sound Mind by Dr Barry Krakow
http://www.amazon.com/Sound-Sleep-Mind- ... 111851601X
Also read RobySue's blog...you aren't alone with your sleep issues.
http://adventures-in-hosehead-land.blog ... er_19.html
I know that cpap isn't your entire problem but she makes really good points here for even those people without OSA complicating the sleep.
So...check the half life for those meds you take...see if taking them earlier helps at all.
Do a lot of reading about what you have going on.
5 hours of sleep even if solid without wake ups and a nice pretty CPAP report...not enough to expect to feel all that great. I wish it were that easy.
I may have to RISE but I refuse to SHINE.