diarrhea, pain in stomach, distended stomach, pain in back

I had my gallbldder removed a year ago in April. I had a hysterectomy a year prior to that. I am having alot of problems with weight gain, diarrhea and just overall pain in my stomach. I was also having reflux and went to the doctor for that. I tested negative for H. Pylori but he went ahead and put me on protonix for the reflux. I have diarrhea every day. So much so that I know have a sore bottom and hemmiroids. Does anyone know what causes this? My stomach is bloated and I have pain and swelling where my gallbladder was that radiates to my back, just as if I still had my gallbladder. Could it be scar tissue from past surgeries? Prior to the hysterectomy I had 5 surgeries due to ovarian cysts in 10 years time. I feel miserable and fat and hate to eat because I know I will get sick. Any thoughts?