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...