Hi, I wish your DH the best and that his pain will be relieved soon.
It often takes time for the pain to get better, especially if it has effected any of the nerves.
I take it your DH had to go ahead and have a fusion, so give it time and have him listen to the Dr's orders..
Please feel free to some back and keep us updated and also you"ll have someplace for support for you both.
Linda