My fiance has a pain in the back and legs on her right side she sometimes has pain when urinating im really worried she also has pain in her stomach?

See Doc: She may have a back problem that needs urgent care. She needs professional assessment as soon as possible.

She.needs to c doc: It is very difficult to assess any problem when told by a third person.Paini the legs could be anything from a mild muscle strain to a clot in the legs (thrombophlebitis); is she at higher risk for these, i.e. Does she smoke, is she on birth control pills? Pain with urinating in young females is almost always a uti. Stomach pains is another issue. A good history, physical, testing needed. See pcp.