Just relax and eat stomach ache pills. Lie down and put a warm towel or something on your stomach. Dont eat anything cold but only like porridge or something that is warm. If that doesnt work go to the hospital because something worse might be going on in your stomach. I hope i helped
what I do is to first lay down and stay very still. then just DO SOMETHING TO DISTRACT YOU like read/watch tv/ listen to music. A heating pad might help you, too. It should take care of itself after a while but don't hesitate to see a doctor if it doesn't..