I think I'm experiencing the same thing?
I get pain along my left side, sometimes between my navel and hipbone. It varies from mild to severe, to a dull gnawing ache that comes and goes, and sometimes feels better after I've eaten.
Sometimes, it lasts for days.
I got it two nights ago (the pain), and it's been off and on repeatedly all that day, the next day, and today. It got so bad I couldn't sleep.
It feels like it's under my rib, or like something's moving. I've been researching, and I'm convinced it's just irregular bowel movements, or one of the following:
Gastritis, Irritable Bowel Syndrome, Diverticulitis or a stomach ulcer (Peptic ulcer). I'm not really sure what to think of it, but it's been on and off since atleast September 2008.
It can't be my spleen, because it doesn't feel enlarged. And I'm pretty sure my kidneys function properly, and that I just don't get enough fiber in my diet.
But I've been changing my diet some and nothing's really improved. I'm thinking of going to the doctor.
Also, I'm a fifteen-year-old girl, so I shouldn't be having too much problems? It's all in the left quadrants of my abdomen.