Oh Liz, I`m so very sorry to hear this - you have been through so much, and always do your level best to support others. The flu will have been really debilitating, and it has been such a long road to recovery since your last op. I can well understand that you just want to tell everyone to leave you alone.
It sounds a very bad crack - I cracked my pelvic bone in 2007, and it was excruciating, and funnily enough I had to beg for an X-ray, as my then rheumy thought I`d just have bruising.( after a fall.)
As you say, only you can make a decision, but there is so much to weigh up, and long-term damage will surely complicate things further, if you don`t have the surgery.
Whatever you decide, I know your lovely family will be with you every step of the way, and all your friends on here will be with you too.
Take care, Liz, and thoughts and prayers to help you.
Love, Kathleen xx