Pain in stomach, spreading to back, problem in standing and walking. How to overcome this?

Hi and welcome to HCM.
This sounds like gallbladder disorders. It is most commonly caused by stones and it goes with symtoms yor are describing especially if pain is aggravated by meal and fatty food. This is crampy,colicy kind of pain which isnt constant , and usually is associated with nausea and vomiting. To evaluate gallbladder you should do ultrasounds and liver enzymes levels. After this cholecystectomy can be performed. Till that you should avoid fatty food and alcohol. But you should considerd some othe rdisorders such as ureteral stones and pancreatits. Ureteral stones can be related to your urinating difficulties.
Wish you good health.

Hi Pauline ! The symptoms you have described points to some kind of pressure symptoms possibly on the spinal cord structures. As it is a long duration history, some kind of slow growing space occupying lesion either in the abdomen or in the spinal column can not be ruled out. I do not know what all investigations have been done for you. However, I would suggest you to see your family physician first, who may like to refer you to specialities like Neurology and Sugery. I wish you an early recovery.