For me, it feels like I could be in bed all the time, even though I won't always sleep.

I feel the same way too, but I can always fall asleep....
Are all these symptoms cause by sleep apnea? or is there something else? (as far as you know?)

I hope they can be, though on CPAP, my symptoms haven't been helped much yet. The stress of not knowing for sure has made me even more non-functional.  Some people think my symptoms are from Chronic Fatigue Syndrome with apnea, but I can really get hypo at times - imagining heart disease, breathing problems, brain damage of some kind that the CAT scan didn't pick up, and something wrong with my stomach besides IBS and/or anxiety. I have been gaining weight, so the cancer hypo has at least subsided.