I suggest you find out from an “expert” neurosurgeon , or your own, exactly why fusion is required. Find out exactly what pain or pains it will be relieving and how the surgery will accomplish that relief. If he or she has detailed replies, ask about your doctor’s experience and success rate with spinal fusion.
Also, inquire about PT as soon as you are able to keep your core strong. Too many doctors are operating under the add hardware system and keeping patients in the dark about their standard protocols for “curing all back pain.” Ask a lot of questions about what physical therapy you can do to avoid surgery – not steroid shots which can cause arachnoiditis. The best of luck!