Severe vomiting

So on Saturday night after dinner i felt really full even though I didn’t finished my dinner so i said okay im running out of space so that might be the cause but after like an hour of eating, I felt really nauseous so i drank water with lime and that took away the nausea a little bit. At around 4-5 am I woke up with the urge to vomit so i ran to the bathroom and threw up everything i ate. Since then everything i eat I threw it up even water. I called my ob on call number and the doctor told me drink Zantac or tums and water with sugar. Nothing seems to work and i am so hungry but im so afraid of eating because i hate vomiting, it burns my stomach and my throat everything i do. Can any mommas suggest something else? Im desperate 😩