Fusion Here
I had a multi level fusion L4-L5-S1 about a year and a half ago. It sucked but I am happy I had it done. It took about a year before I could start really training again.
Mine was bad, I had nerve impingements and could not feel my legs etc....
End result for me is 10 pieces of titanium in my back, but now I can feel my legs, lift and play with my kids. Granted my back muscle fatigue quickly and they cramp up, but not being able to pick up your newborn daughter prior to surgery made it well worth it.
I would suggest you consult with a neurosurgeon.
It can be a long road to recovery but it can be done.
side note, it was not caused by a lifting. Lucky me got hit by a bus.