Okay I have been getting sick (vomiting) since before I can even remember about over 5 or more times a day. The doctors ran tests when I was younger we did some stomach x-ray or something of the sort ...
Most of what people eat is not meant to be eaten so you could be allergic to many things if your body is extra sensitive. A food allergy is simply the failure of the digestive system to properly prepare your food for entry into the bloodstream, and this is usually due to undigested proteins in meat, grains, dairy and any cooked food that produce acid. If the acid and undigested protein remain in the stomach it can cause inflammation and be forced back up through vomiting.
Were you eating only RAW fruits and veggies before? Have you ever considered a fast? Your digestive system is probably impaired and very weak. If you did a fast and then took up a diet of raw fruits and veggies it could very well be the answer. This is a link to a very good doctor that could help you http://foodnsport.com/shop/coaching/consult.html