Haven’t really had problems with the thyroid with my Grave’s, just the eyeballs (severe!) but know how nasty the depression can be. Last year the doc put me on an antidepressant and it really seemed to do the job. I didn’t like being on them too much, instead of wide swings such as feeling real good to feeling real bad, it put me some where in the middle. After about 3 months tho I could get off them and have been doing much better ever since.
Don’t hesitate to see a doc about depression, I waited till I was pretty much a wreck, wanting to cry half the time.
All the best, Bruce