Lap Band and Post Gall Bladder Removal Problems

I am a 44 year old female. I had my GB removed about six years ago. I had a lap-band put in for weight loss about four years ago.  I have not been successful with my weight loss, however I am plagued with chronic lower bowel problems. Since GB removal I have had near chronic diarrhea. I am fatigued. My stool is always loose and has a horrible smell - moreso than the normal bad smell of stool. Eating out is a nightmare.  I have to go to the bathroom shortly after eating and no one wants to have to have explosive diarrhea in a restaurant.  I have also experienced incontenence. If I had known then what I know now, I would have tried to avoid GB removal by any means possible. I am wondering if I should have the lap-band removed and if it is making the GI problems worse. I fear IBS and the increased chance of colon cancer. My father had colon cancer- DUKE's 2B and is twenty years "cured" or NED. My lower back hurts as well as my abdomen. I have heard that Librax can relieve bowel spasms.  Any advice? I have small children and this has impacted my entire family's quality of life.   Kiki