My Wife Was Having Constant Pain With A Possible Muscle

My wife was having constant pain with a possible muscle spazm in the right lower side of her back. We figured she could've been dehydrated and it seemed to help a little bit. A few days later, the pain returned and we made a doctors appointment. Doctor had an ultrasound done on her kidney's since she's had kidney stones in the past. Well, today she contacted me stating that anytime she would eat, it would cause pain and make her feel like she's throwing up. I'm just curious on which direction I should go in with this?