Upper right quadrant back pain radiating to front. Had UTI tests, blood tests and back X-ray. Diagnosed arthritis. Two weeks. Is this possible?

Possible. It is possible, but if you are having recurrent pain in the right upper quadrant of the abdomen as well as back pain you may have something else going on. I see that you are also on prednisone - this may make you more likely for other problems as well. You need to get in for reevaluation of your pain. You may need an ultrasound or other studies. Please get in. Take care.