Constant Hunger that makes me PUKE!

Hi, so Im 16 weeks and 6 days and I'm constantly hungry. like i mean I have to constantly eat. even at night. I wake up at 3 am every night completely nauseated and so hungry that it makes me puke. I usually go to bed around 11 with a full stomach. This morning I tried to eat cereal which wasnt enough. then I made TWO bowls of chicken noodle soup, its been maybe 15 minutes and im starving to the point where its making me sick again and I want to puke. Its like everything I eat just disintegrates as soon as it gets to my tummy. What in world can i eat thats going to keep me full for at least an hour or more????