Does anyone know any home remedies to relieve stomach cramping after vomiting?

I have been up all night vomiting, I seem to have stopped now as long as I dont eat anything however I have very bad stomach cramps now and have tons of revision to do today so can not stay in bed relaxing. I have nothing in my stomach apart from water and so can not take any pain killers as this bothers my stomach. I also do not have a hot water bottle and cant make it into town. does anyone have any home remedies to relieve my stomach cramps or am I just going to have to sit this one through while trying to revise?