I have moderately severe depression, and ASD. I can’t take medications because it triggers a health condition I have (RLS), and CBT doesn’t work well with how my ASD presents.
Those seem to be the top line treatments for depression of this severity.
Other things I do that are meant to help are exercise (swimming), and I eat healthily (mainly because I have to as quite a few unhealthy foods are RLS triggers). Sleep-wise, it’s ok but I don’t get a lot of deep sleep (average of around 20-30 minutes). I do maintain good sleep hygiene (is it just me or does anyone else hate the term ‘sleep hygiene?’).
What has helped your depression?