Bless your heart ~ You have been thru hell, and my heart goes out to you. I am so very sorry for the loss of your sons.

I cannot even imagine what you have gone thru! You are an INCREDIBLY strong woman, Muppy, and you have my utmost respect! You also have my prayers.
Muppy, of course your exhausted and that's why you want to sleep. You're emotionally exhausted. Your mind is going 100 miles an hour, and you haven't had a moments' peace! I doubt you've had a good night's sleep in forever.

Have you talked to your doctor about this? If not, would you do that please?
Also, talk to your doctor about depression, because you certainly are depressed! I can read that in your post.

And when you're depressed, it's difficult to get decent sleep. You need help with that.
You have your hands full, my dear friend. Do you have any friends who could care for your husband for a day, so that you could have some free time? Or does your insurance cover a nurse for a day once in awhile, so that you can get out? Or even so you can SLEEP? Some insurances DO cover nursing care for short periods, for respite for the care-giver. You might look into it.
I wish you the very best, Muppy. Please let us know what happens, will you? Or you could private message me but I'd like to know. God bless you and please take care. Hugs, Lee