Get your sleep apnea treated first! Have a sleep study done to determine how bad it really is. Someone with sleep apnea never gets the deep restorative sleep they need, even if you're in bed for 8 or more hours a night.
A really good friend who was under a lot of stress at work, working insane hours and crazy overnight shifts had similar problems. In addition to having problems at home, he was on-call whenever he wasn't at work or online working from home and was also diagnosed as being manic depressive. He was prescribed two or three different sleep aids and they messed him up badly. He had a really awful breakdown, lost his job, almost lost his family and made some really poor financial decisions.
While he was being evaluated and eventually hospitalized, it was discovered that he had sleep apnea. He was given some kind of breathing machine to counter the episodes where he would quit breathing. Relieved of his crazy work schedule, pressures at home and finally able to get some real sleep, he eventually turned everything around, got a new job and is working on repairing his relationship with his wife and kid.
I believe that lack of sleep was the primary cause of all his problems, getting his sleep apnea under control probably saved his life.
Who knows if your situation is similar? I'm definitely not a doctor, but my advice is to take care of the sleep apnea first and then see where you're at.
Good luck to you!
If it weren't for the last minute, a lot of things wouldn't get done...