Drugs, alcohol, and now coffee! I’ve used a variety of substances to self medicate while in a depressed mood. A few years ago I cut out cannabis, and I stay away from using alcohol when I’m down, but I have no limits with coffee. It seems like I can drink as much as I want whenever I want and it doesn’t create the same problems it does when my mood is better.
If you’re in Canada, there’s an online service called Frida https://www.talkwithfrida.com/
I was personally diagnosed by a psychiatrist who I was referred to by my family doctor. I think you have to go through a psychiatrist at least while you’re titrating your dose but then your family doctor may be able to take over once you’re about where you need to be.