Nissen Fundoplicaton Surgery Questions

My situation is very complicated. The surgeon said I must have my throat operated on first for cricopharngeal achalesia and fixing a pocket (diverticuli) where food gets stuck and makes swallowing difficult, then I can have the Fundo surgery after that.  When he does the Nissen Fundo surgery he said he will have to remove my g-tube and remove any scar tissue plus he must detach my stapled stomach to put it in a new position.  I had no idea my stomach had been stapled to something when the g-tube was placed.  He will have to cut away any scar tissue there too.  He cannot guarantee a great outcome but he's very optimistic.  I do have confidence in this surgeron.  He is very skilled, compassionate and has a wonderful repution. 

I have run out of options. I have tried all the anti-reflux medications for years with no benefit.  My pH levels continue to rise.  My throat, esphoagus, vocal cords and stomach are on fire every day.  The meds are making my osteoporosis worse.  I'm on Carafate too until I have the surgery.  I want much to feel better.  Acid Reflux is just one of my many diagnoses most of which are related to my brain disease (cerebellar atrophy). My digestive system is "dysfunctional and disorganized from the base of my tongue to the anal sphincter".  I sure hope I'm not going to be worse after this surgery.  I don't expect anyone else to have exactly my problems but if anyone has some encouragement about going through with the surgery, I'd like to hear from you.  I sure don't want to end up in wose shape than I already am.  I've had 18 surgeries and this is the only one I've even felt uncertain about.  Having 4 brain surgeries was easier than this decison.  What else should I be asking the surgeon?