I have sleep apnea. I was falling asleep several times during the day, just sitting at my desk. Also I had a lot of times at night where I would wake up almost in a panic attack for no reason.
Was diagnosed with sleep apnea and have a CPAP machine. I was told I would sleep better, life would be brighter - and I do sleep better, and never wake up panicked anymore from lack of oxygen - but the darn mask is so uncomfortable I wake up several times a night anyway now.