my belly hurts but all says normal.why?

My problem is my belly is sore and hurts. ct scans, blood work, upper and lower g.i. says everything is normal. But I hurt. . I have lost 13 lbs. in 4 months. problem started at thanksgiven. I went around rubbing my belly cause it hurt. Then by Christmas. the pain increased. So the the 1st of March my gall bladder had lots of stones. So the Dr. took it out. That had made my belly hurt worser. The hurt is where the gall bladder was over to my the left side of the belly button and under my belly button. If i eat I often hurt. I had a McDonalds fish sandwich at 12:30 one day then by 4:00 p.m. it felt like the fish was attacking me. By 1:00 a.m. I was in the floor hurting like crazy. But I also hurt if I set sit in a chair and put my drink in the floor ---- then I bend over to pick it up. Bending over to tye my shoe hurts.