I had ECT this past summer. I hope all goes well for you. I had 6 treatments in all, unilateral. I have almost no memory from around that time, and have the last year or two that I don't remember much, or have to be reminded. I guess at the time it was the only decision left, to save my life. The last thing I thought of right before going under was my 2 kids, their names and ages. And, I didn't ever have any problem with that (even though my son turned 12 in the middle of it). I would suggest that you write notes of stuff that you need to remember, especially short-term, before you get too far into treatment.
I am thinking of you, I know it's a hard decision to make, but I guess it is worth it, to save a life. Please know that you are not alone, and are in my thoughts
HUGS