Best of luck with your depression. I'm sorry to hear you are suffering. NPR today had a piece on deep brain stimulation as a treatment for depression. Very preliminary research and very invasive but something is better than nothing. [0]

Also, Michael Pollan's latest book on psychedelics is very interesting and has a specific chapter about using psychedelics to treat depression. It might be interesting to you. [1]

0. https://www.npr.org/sections/health-shots/2018/11/29/6718660...

1. https://michaelpollan.com/books/how-to-change-your-mind/