you're running into an unfortunate but common reality of cervical fusion. The neck moves through a great range of motion and more than any other part of the body. When you fuse one part, the other part has to move more to take up the missing movement. You wear out the levels above and below the fusion more quickly. You may have been warned of this by your surgeon. Also, you have findings of spinal stenosis (a degenerative condition you'd likely have had no matter what), that is likely at least partially responsible for your problems. Sorry but it sounds like further surgery may be necessary. It's usually a better idea to seek a neurosurgeon for this type of surgery. Best wishes.
i also have left hand and fingers they go numb