digestion problem after gal bladder removal

I had my gal bladder removed 3 years back . For last two and a half year apart from pain I was feeling normal . I have also problem of hammeroids . Last six months I am having problem in digesting food. I thought this is because of spicy food i am having. Whn I stopped eating spicy food the problem reduced but not eradicated. Now I cant eat much .I have problem of gas whole day .  I usually eat rice and brown bread only. After the passing of stool my stomach swells and I feel heaviness around stomach . After that I cant even stand. My pelvic muscles starts paining.  I am losing weight . I cant eat normal food . Lemon helps me in digestion . If i eat anything other than rice the problem of diarhea (diarrhea) reappears and hence hammeroids too . Is it because of the diet or any other problem ?