left side pain, 3 months out

I  woke up with pain in my left side, around the left towards my back, and above the stomach area (left rib cage).  Of course it would be the weekend so I can't call the doctor and the hospital is 3 hours away.  I'm just wondering what it could be?  Any ideas?  I haven't had problems previously, and was feeling really good until this morning.
Joanna

How much and what kind of these do you take or eat?
calcium
tea
coffee
brown sodas
dark lefy greens
nuts
seeds
grains

water
things like Crystal Light (citric acid)

I can't eat nuts/seeds due to diverticuler disease.  Am not getting much dark leafy greens or grains.  One cup of decaf tea/coffee in the am.  No soda.  But I do drink a ton of crystal light. 
Is there something to flavor water with that isn't full of citric acid?

Has the pain moved today?

Crystal Light/Citric acid is good, generally, but of course, it doesn't replace naked water.

What I was looking for was kidney stones. Mine were much like yours in that I had minor pain for 3 days before I realized it was getting worse and took myself to a doc.

The pain isn't as bad today, but it isn't reaching around to my back anymore.  I ate only vanilla pudding, cottage cheese, cream of wheat, and water yesterday to give my pouch a rest.  The good thing is I have an appt. scheduled with my doc on Thursday and I just had my blood work, so if there is a problem I can get it taken care of soon.