Good for you for giving ECT a try; you're very brave. Many of us know what it's like to be at that place where you've tried everything, but you're only getting worse. I know a lot of people who said it saved their life.
I, myself, had both unilateral & bilateral treatments (20+) back about 12 yrs ago. Unfortunately for me, I only had a 6-wk positive response (but, boy, did I feel great! If it had only lasted..) I did experience both short and long-term memory loss. However, I'm sure they've made great improvements in treatment since then, and I did have a pretty intense series of treatments. I found in-hospital treatment to be preferable, mainly because there's no gruelling travel schedule & waiting room to endure, and healing is done right 'there'.
Best of luck as you progress!
Fibromyalgia, CFS, possible MCS, Chronic Depression/Anxiety Disorder, Agoraphobia, PTSD ... But they're all connected & I'm working on them all - I will prevail!