Has someone suggested you do ECT ?? You can read about ECT in Dr. Peter Breggin's books. One of my illustrators has been given ECT monthly for over a year. Possibly two. And he has no memory what so ever. He just keeps repeating himself.
On the other hand, I knew a woman active in a depression support group that had ECT just a few times and it stopped her severe depression.
The only other experience I had regarding ECT was I met a man who wrote a book about how ECT ruined his life because they gave him so many sessions of it.