Check out Barnivore. Sounds like a gluten or lactose Intolerance or wheat allergy and this site will help you cross reference what you have drank in the past which has given you the same response it'll also help you avoid things in the future.

Hey, I'm sure you here it all the time but I really don't know how to move forward. I've spent years with D and vomiting. Doctors telling me it's disordered eating, a choice to over restrict my diet. That I should just eat normally. I just got sicker and sicker. Chronic pain and fatigue, sleeping aw...