I'm sure you are fine and it is just a mixture of your anxiety and hunger reacting! This happens to me quite often and I barely eat some days... just some cheese and pieces of lunch meat sometimes. By the end of the night I am feeling quite nauseous and I find if I eat something the nauseous feeling totally disappears and my anxiety drops. It's a horrible cycle. I also find that if you can tolerate the site, smell, and thought of food going down then you are not really nauseous.... and if it goes down with no problem you should be fine. Try to eat something light. Small sandwich maybe? Soup?