Your gallbladder is on your right side. You can feel pain in the middle to right side and through your back. Maybe you pulled a muscle? I did last night in my back on my left side and it hurts real bad. Hope you feel better. If it is concerning to you, call your doctor tomorrow.
HW: 375 SW: 325 CW: 263 GW: 160
Pre-Surgery WL: 50lbs