Chronic pain and spinal fusion

Hi
I am wondering if there is anyone out there has experienced what I am dealing with? In 2006 I had a spinal fusion from T2 through L4. Actually the fusion failed and after one year had to be repeated, this time using a bone morphosizing protein that ensured fusion. Like most who have endured a surgery like this I am left with chronic pain. I have through the years also developed quite a dowagers hump. The surgeon explained that my problem went up so high that she actually bent the rod a bit forward during surgery otherwise noting that I may become off balance. As the years have gone by this hump is looking more and more pronounced. I absolutely hate it and feel so ugly, can anything safely be done or does it involve another dangerous surgical procedure? As you can imagine the thought of more surgery is frightening to me. What complicates matters is I am on Warfarin (blood thinner) due to aortic valve repelacement in 2001. Any surgery for me is always more complicated.