Why is my stomach hurting for two days in a row? There's no bloody or …

Why is my stomach hurting for two days in a row? There's no bloody or brown discharge. But there's abundant yellow-colored discharge, without an unpleasant odor. It feels like something might be wrong at home and it starts to hurt. I have to lie down for an hour until it lets up, then I go out again and it hurts again???Has anyone experienced this? Should I worry?