Hippi gives some good advice. Your doctors and rhuemy can give the best advice. I can tell you from my experience, I had a complete hysterectomy (abdominal) in October of 2001 and by February of 2002 I was experiencing what turned out to be a major lupus flare. I wasn't officially diagnosed until the summer of 2005 but it was a hard and painful journey timed quite close to the major surgery.
On the other hand, who is to say I would not have had the same experience without the hysterectomy? All I know is that I was having serious problems with my endometriosis turned adenomiosis, that I could not put the issue off any longer. For ten years (from age 30 to age 40), I tried every option and avenue available until I had no choice but to pursue the hysterectomy. At the time I did not have a rhuemy, but my family doctor and gynecologist really encouraged me to go on with the major surgery.
What I am saying is this, if you really need the lapband surgery for health reasons such as high blood pressure, high cholesterol, diabetes prevention, or other serious health reasons, then you would be wise to clear everything with your doctors and rhuemy and carefully proceed with their guidance. I have two friends who had the same procedure and everything went quite well for them both. They were not dealing with the same set of circumstances as you but they did receive major health benefits for other issues as I mentioned.
Good luck, honeygirl. My thoughts and prayers are with you.
Lupus, RA, and (Maybe) Fibromyalgia and LOTS of Medications!