Hello & Welcome, Ambivalentlythere!

I am depressed. I also have auto-immune and neurological disorders. The depression diagnosis preceded the other diagnoses by 4-5 years. It is possible the medical folks might have caught the other problems earlier, but the depression diagnosis acted as a lens through which they interpreted all other symptoms.

If your situation allows, make sure your doctors screen you for other conditions. People can have more than one sickness.

I wish you well.