Stress/Anxiety/Insomnia/Memory Issues

Hi everyone,
I've had depression for the past 30 years or so and was on some heavy medications, tried ECT, etc. Nothing worked. I ended up trying the Ketamine Infusions and they worked for getting rid of my depression. I'm still dealing with anxiety and some really bad memory issues. I can't remember a lot of things that happened in the past and I am having trouble with remembering new things. Sometimes I am OK with making new memories, other times I can't recall a damn thing. My doctor is telling me that it's the anxiety and the insomnia that is causing the problem with my memory. Before the Ketamine treatments, it was depression and anxiety that were causing my memory problems.
I'm scared that it's the medication I was on for so long or the ECTs I underwent at the suggestions of my old doctor. She had me over medicated so I wonder if that could be some of the problems too. I have this fear that it is early onset dementia.
I'm also dealing with being separated from my wife and daughter right now. My wife pretty much gave up on me due to the depression and asked me to move out two months ago. Now that it is gone, she is angry about my memory issues and wants me to come up with a plan to fix everything that has gone wrong in our marriage. I tried sitting down with her last night with a pen and paper so I could get a list of things she felt needed to be fixed and she wouldn't go over it again with me. I am pretty sure we are done at this point which is adding a lot of stress to my life. She has some issues too but doesn't believe she does so they have gone untreated. Her issues have caused a huge rift in the family over the years and made my depression worse. I have always been a fixer so I keep trying to fix the marriage. I think at this point, it might be better if I stop trying.
My daughter asked me to take her to a therapist last night because of what she is going through right now and how she is feeling. I will be calling her doctor and getting that set up today. Something else for me to worry about right now and I am really scared for her.

Thanks for 'listening.'