Laura, I'm sorry you are having such a rough time. You aren't going to fix this mess right now. Not only do you physically not have the strength, I am sure that mentally you are exhausted and emotional with everything you have been through, not to mention all the drugs you have been given. If I were in your shoes, I would call your mom, have her come to your house tomorrow, get in the car with her and drive off to her house. And, oh yeah, don't look back. Stay there for a couple of weeks. Don't feel guilty, just do it. Otherwise, you are going to wind up with setbacks.
There is no excuse for your husband. He is an adult and needs to step up to the plate. Period. As for your kids, they just probably don't get it. I know I was surprised at how laid back my kids were about the whole thing. It wasn't until last month, when I was having a conversation with my 12 year old about my surgery that I finally got it. I asked him what did he think/feel last year when I was having my surgery. He said as sincerely as possible, "Well, I wasn't worried at all. I mean, I knew it wasn't serious and so I knew you weren't going to die or anything", I took a breath, getting ready to tell him that wasn't the case at all, and then I realized I had worked hard to let him think that exact thing. I just smiled at him and said "that's right honey, it wasn't serious at all".
Please know we are here to listen to you anytime.
Kim