Having lower back pain on right side/hip. also have pain in right side rib cage. feels like i got punched or a bad bruise. what should i do?

Must rule out kidney: Have your primary md be sure you do have have a kidney problem. Otherwise heat, rest, no lifting or rotation and make sure you recheck in with primary md.

See a Doc: If the pain is not going away or getting worse you should see your doctor for an evaluation which would include a physical examination. Most of the time these things tend to go away on their own but if they don't it could signify a more serious problem and should be checked out by your doctor.