I've had all my blood tests and urine tests done and all clear and had a ultra sound on my abdomon area all clear also but the pain is my stomach and back is constant sharp pain in stomach and back awfull to i don't know what to do i recently want from 24.7 to 28 stone in 3 months to test if i wss sick or not but the psin still there after eating feeling sick but still eating lots what is it I have