Probably you will not like my answer :-)
From what you describe, you seem to have developed increased sensitivity to your physical appearence and also, as you yourself put it, have "become depressed", having persistant sleeplessness
, following a particularly stressful bereavement.
I seem to remember, from whatever I could remember from my medical student days, that sleep apnea
does not occur because of blocked sinuses
so do consult an expert.
If you continue to be worried about your physical appearence and the doctors have ruled out physical causes, then do consult a psychiatrist