I've been living this horror for six years.If I'm in too much pain to physically get out of bed, how am I supposed to exercise?
I would email you, but you have no contact info. I imagine I will regret posting this. I usually do. Some broken part of my brain has yet to master hearing of someone else's suffering and going "Welp, not my problem!" It is still on my To Do list.
Some general thoughts, that may or may not be useful to you:
One of the benefits of exercise is that it moves lymph. This is how the body cleans your tissues. It is a necessary function for doing repair work. Think of how old buildings get rehabbed: The first step is to rent a giant dumpster and start doing demolition work and hauling out the trash.
Any muscle action at all will help move lymph. If you just can't do anything, warm salt water baths and massage can help your body take out the trash.
The other thing is you probably are dehydrated and suffering various nutrient shortfalls. The body needs resources to rebuild. After major surgery, you need major resources. Doctors never seem to prescribe higher nutrition during recovery. Additionally, medications routinely interfere with the absorption of certain nutrients or cause wasting of those nutrients. You should google this for every medication you take and up your intake of nutrients your drugs are known to deplete.
Spine surgery involves both bones and nerves. Nerves need extra B vitamins and specific fats to help heal. Bones need extra calcium, magnesium, vitamin D, vitamin K and B vitamins to help heal. Bone marrow needs healthy fats.
Some best practices:
Keep a food journal. Read up on symptoms of specific nutrient deficiencies. Taking supplements is easier at first than making dietary changes because you can do a better job of isolating specific variables because you can just add X nutrient instead of swapping one food for another. Do one new thing every week or two so you can watch how it plays out.
Sugar, mint and non drug antiinflammatories (like cinnamon and hot peppers) can help make pain more bearable.
Source: 16+ years of firsthand experience. (I used to be bedridden, and I spent 3.5 years in please-kill-me-now pain. I got myself better after doctors basically wrote me off.)