What level did you have fusion? I'm not clear on that.
The burning COULD be from the nerves healing, but usually it's not quite that bad. Did he put you on any medication for that? There IS medication for the burning-type pain -- now whether it would work for healing type pain, I don't know. But it might.
Nerves grow back at the average rate of one inch per month -- so depending on how extensive the surgery was, and how much nerve damage there was, it could take awhile for the nerves to heal.

But it does seem pretty strange that the pain is THAT severe. Plus the extent of the tingling is disconceerting too!
I hope this all "fixes" itself soon. I'd hate to think you'd have to have more surgery in the near future. Do you know how many of these surgeries this doctor has done? I hope he's done alot of them before YOU.
Keep us posted, and hope to hear from you soon. Hugs, Lee