I woke up to an intense sensation?

Like I was so extremely hungry it hurt a little. My stomach felt like it was being wrung out like do a washcloth and it felt like something was working its way up my stomach like I was going to throw up. I was so hungry though it scared me, so I ate a bowl of cereal and that helped for a couple hours but then the sensation came back again. It was worse when laying down but not really any better while sitting up.I've never been that hungry in my life. I had good meals yesterday I don't understand and the feeling is coming back now. Any thoughts its extremely uncomfortable ;/