Has anyone experienced excessive daytime sleepiness that is NOT a direct symptom of their mental health condition or medication? I've been dealing with this for years, and it's grown more pronounced recently, actually leading to a relapse of my depression because the fatigue was dragging everything down.

I saw a sleep specialist recently and did a home sleep study which checks airflow and apneas. It was essentially normal although I do have allergies and small nasal passages, so there is some possibility that I have upper airway resistance which can affect sleep quality. So we're doing basic nasal care (saline, antihistamine) and I'm planning on trying the breath right nasal strips as well. Possible repeat sleep study in the lab if I'm not improving.

Was a diagnosis ever found in your situation? If so what were you diagnosed with? if a cause wasn't found what was your treatment or coping mechanism?