im 22 m i have a history of gastritis im on nexium 40mg a day..yesterday i started feeling these really bad pains in my stomach my lower abdomen area,its worse when i walk and when my stomach expands for any reason like breathing in or anything that requires my stomach to expand..i was thinking really bad trapped gas..but ive tried severeal things gas x for 2 days,peppermint tea..i dont know what else to do..any other ideas on what to do or what else this could possibly be?