I am a diabetic patient but lately I realise that my left side had something like a stone and very painful. just straight around my belly button to the left side. when I eat protein like pork or chicken i feel the the meat is hard to break down and feel very uncomfortable and sick. I cannot eat solid or hard food as it is too painful. At the moment I am sleeping on one side which is my left because my right side is very sore. I do not know what is and really the problem.