I used to say that too, "If I were a horse they'd shot me by now."
I sure wouldn't be worrying about drawing anyone and everyone into your situation, if they can help, let them. Let them also be their own guide on what and how much they can do and handle.
I am so sorry for your plight! Now that we have your overall account of what is going through your brain/mind, can you set in a list exactly what you are needing? Maybe that listing would also help your doctor help you