Stomach Pain

It’s going to be a week now but I’ve been having stomach pains. It would move to my left side abdominal and then the middle of my stomach just above my bellybutton. The first things I noticed was I would feel nauseous and if would feel like I’m starving even tho i already ate, plus I don’t want to eat like I can go 1 day without eating or drinking anything. I can’t even sleep on my stomach or my stomach would hurt. I need advice if it’s just the stomach virus or something more serious!