i had this same problem today after eating some waffle house. It only happened to me once before in my life. I can literally feel the food traveling through my digestive track as slow as Christmas and it feels like razor blades all the way down and then it gets stuck and aches until apparently I vomit. Also causes severe back and chest pain and brings me to my knees as it worsens. haven't pin pointed the source but i'm going to go with Contaminated Food. Going to get these leftovers tested for salmonella or whatever germs would cause this.