Well the urine smell indicates an infection - take her to your vet, she will be feeling very unwell, and make sure she has plenty of water to drink at all times. Never mind the accidents - the less water she drinks the more fishy her urine will smell and the more discomfort she will be suffering.
I am not familiar with the uraline product and it does not come up when I search the veterinary forum. Your dog should have an urinalysis run to make sure this is not infectious in origin, screen for protein in the urine, screen for diabetes, and to check kidney function. In any older dog that becomes ill blood work needs to be run. Incontinence or senility can cause inappropriate urination in older dogs. Bloodwork will also verify that the liver and kidneys can handle pain medication. Limping can be due to sprains/strains, joint injuries, arthritis, and bony tumors. If x-rays were not non-diagnostic and your dog is not responding to pain medication I would have her examined by a Veterinary Orthopedic Specialist--your veterinarian can refer you.
