Lessa is spot on about your spine. I have an additional observation. Your origional fusion is C5-6, now the one above and below are having some trouble. Make sure you go to a neuro surgeon, not assiciated with the doctor who did your first fusion. This is a good thing to do, when getting that second opinion. Also the verterbre that said Severe, would be the first thing I brought up to the doctor. Bring someone with you, and keep your pain journal. This helps the doctor, and backs up what you are saying concerning your pain.
I don't know if this is something surgery could correct. Make it your last option when all other conservative measures fail. The domino effect can get to be a big issue with repeat fusions. That is where the ones above and below the fusion site, do not hold up due to the hardware, or condition of the verterbre. I sure wish you all the best as you go forward in this. None of it is fun. I hope you find that second opinion, and a doctor who has some compassion. ginnie