I had a hysterectomy in May of 2009, and then donated my left kidney 5 months later. (October of 2009).
During the testing for the kidney donation, they discovered I had 2 large gallstones. I had been being treated for "Acid Reflux" for a couple of years prior to the kidney testing, and I was on some rather expensive medication for acid reflux.
I had a third surgery in March of 2010 to have my gallbladder removed (This was 5 months after I donated the kidney). While in there, the doctor said my appendix didn't look right either, so he removed my appendix as well. I no longer am on any medication for acid reflux and have had no more problems.
I am not saying that would be the case for everyone, but that was my experience. I was down 4 parts a ten month timeframe, and I am doing great. I am glad to be rid of my gallbladder and all of the problems it was causing. (and yes, I have had a lot of jokes from my family and friends about not being "all there".)
Best of luck to you as you go forward, and congratulations on the 4 out of 6 match! Please keep us posted how you are doing and how things are going!