I'm not sure what you mean by upper GI or stomach area or to what you're comparing these pains.
I don't normally have a stomach ache and I don't normally have pain in my lower left quadrant (~sigmoid, rectum). Most of my pain and cramping is in the upper left quadrant (~splenic flexure) and upper and lower right quadrants (~hepatic flexure, cecum). The left-sided pain is sometimes intense, but the right-sided pain is rather dull.
But if you're having stomach pain, from the stomach, perhaps the pred or other meds are disagreeing with you.