I am sorry you have reached that point where you are considering ECT. My Pdoc studied in Europe and used all the time there.
I had 18 treatments over 6 weeks. Really no problems, minor memory loss, nothing significant. Unfortunately, they did not help my depression for very long. But every person's experience is vastly different and if I thought it would help, I would certainly try it again.
I, like you, have struggled for over 6 years...it is so discouraging sometimes. I recently put photos of some of my happiest times in my life, and of loved ones and I look at them every nite and morning and say"I have had a GOOD life and it is not over yet". It gives me motivation to keep going.
I truly hope you will find your "magic combo" soon. please let us know.