I think you ate way to much heart burn causing food. First off the feeling of not being able to swallow is acid reflux or you might call it heart burn. Second Mac and cheese is very rich that might have not been a great idea. Your temp is up from anxiety I'm sure. You need to sit down relax with some ginger ale or sprite and take an antacid. I bet you will feel way better after that. I don't think your sick just too much rich spicy food.