One thing that comes to mind to me is that for 20 years, the emotions have pretty much been "controlled" by the antidepressant. Now, without the antidepressants, they're coming back "full force." They haven't had time to stabilize.
I would think that after a little more time, the emotions will get more in balance and things will even out. They've just got to get used to not being "controlled" anymore.
I would give it more time, perhaps at least another month. If things aren't ANY better in that time, then I'd talk to the doctor.
I wish you the very best. Take care & let us know what happens. God bless. Hugs, Lee