Over the course of the last two hours I have developed extreme pain in my back. The location is directly under the rib cage in the back area. It seems to flare up throughout the entire back but then localizes again to the lower rib cage area.

I ama 19 year old female and had my appendix taken out already 18 months ago.
Otherwise I am in good health

Optional Information:
Female , Age: 19

Already Tried:
aspirin