What's going on? Are you NOT fusing? You should be fused, at least a good share by now. If you had this done in 2011, yes, you should be a goodly amount fused.
Aren't you fused at ALL?? If not, then something is wrong.
Do you perhaps have osteoporosis? Have you had a bone density test done recently?
I wish I could help. Perhaps someone else can offer some help. God bless & take care. Hugs, Lee