I know that feeling, definitely. I suffer from pretty bad sleep apnea, my whole life is spent hoping for the equivalent of 3 hours of good sleep in any given night.
DUDE! I have sleep apnea as well. GET A CPAP MACHINE! No ---That which is odiferous and causeth plants to grow---! I used to piss at least 3 times a night...I'd be lucky to get 2 hours of sleep. I took the test, and I was having over 80 attacks each night! It took me TURNING BLUE one night to get off ---my bottom--- and do something about it. The doctor said I likely didn't breath for over 5 minutes to turn that shade of blue! It scared the HELL out of me.
I got a CPAP machine. It is uncomfortable, a pain in the ass, but I CAN SLEEP! The very first night I used it I SLEPT THROUGH THE ENTIRE NIGHT without getting up to piss or anything! It was A-FRIGGIN'-MAZING!
I have used my CPAP machine for going on 4 years now, I have thousands of hours on it, and I use it every night (except for camping, I refuse to buy a battery pack for $300 for the damn thing to go camping with). GET IT! Trust me...you will FOREVER be changed.
EDIT: My wife just reminded me that another turning point for me was when I fell asleep at the wheel of my truck on the 5 Freeway during rush hour traffic and almost killed myself and 4 other people. Yup...that was a "WAKE UP" call (no pun intended).
Now, even though I am tired some mornings...its' NOTHING like the daze i used to live life in...