During my 14 year fog before I was diagnosed with sleep apnea, all of my doctors offered me antidepressants when I came in with complaints of sleepiness, fatigue, morning headaches, weight gain and inability to lose weight.
"now, now (patting my hand) you have 2 small children, you own your own business, more than a full time job, a household to manage, you are just stressed. Let me write you a prescription for antidepressants and you need to lose weight"
I never did fill those prescriptions but it took over a decade for a doctor to finally see the sleep apnea!
There is a difference between clinical depression and depression that results from sleep deprivation.