hi and welcome Jamie K.
sounds like you have had a challenging life from reading your post and now the added frustration with your losing your sight. I know of two people who have lost their vision and being in their place or yours would be difficult to understand. I hope you don't mind if I ask you some questions of that I can get a better understanding...
I had to do a google search to find out a little. What stage are you in?
I am also sorry to hear you have had no success with professional help with counsellors. What happened there where it did not work?
I might be misinterpreting your post and with the break up of your marriage and not wanting to burden your children with your issues, it sounds as though there are few people who can support you which in turn perhaps gives you a lot of time to fixate on the problems. Well, that is what happens to me.
On the other hand, I also do things like journalling which help me get the thoughts out of my head and put somewhere else. So I will ask whether there are things that have been helpful to you?
There are other things I could ask and I hope you might come back to share more of your story.