I have been having many of the same symptoms to gluten free grains as to gluten containing foods. This may be the reason Gluten Cross Reaction.  Here is an article on this subject  
Here is a link to a more extensive explanation of Gluten Cross Reaction
Food Cross Reaction in Detail

Well unfortunately with my pregnancy my food intolerances have become even greater. So, I am on an all out hunt to further investigate links and triggers to my many food issues. Here is an interesting article on Treatment for Food Allergies

I found this interesting. CLICK HERE for full article

Cross-Reactions between Trees and Foods – Oral Allergy Syndrome - AAIA Quarterly Volume 29 Fall 1993, Dr. Ham Pong

1. the allergy factor which links the pollens and the foods is not that of being related by botanical family;
2. raw foods are more apt to cause a reaction than cooked foods.  Storage also decreases allergenicity
3. some varieties of the same fruit, e.g., apple, may be tolerated
4. not due to chemical, insecticides
5. allergy tests may be negative unless fresh food extract is used
6. most often seen in adults and is not usually outgrown

Here is a link I found today that may have safe decorating for cakes and desserts. Click HERE

Here is an EXTENSIVE LIST 
another List for BAKING Supply Gluten FREE

We used Meridian Valley. It is only around a $139 for over 80 foods. You can order the kit and take it to your lab for the blood draw

My son was diagnosed with severe food allergies a couple of years ago. His list was so bad they retested him to make sure they were accurate. They were.  Anyhow, we weren't sure what we were going to give him to drink that would have calcium but I found a GREAT replacement that we all drink. I buy it from Azure Standard at cost which comes to just below the cost of organic cow's milk a gallon, but cheaper than say boxed milk alternatives.  This is the link for the company site VANCE'S DARI FREE But I get mine from Azure

It tastes great and is enriches with Vitamin D. You make it in the blender and you can make it thicker as a creamer.
Enjoy!

Here is some important information

Who gets food allergies? Can they be stopped?
Once you have food allergies, there are not any medicines that make food allergies go away. If you
are allergic to a certain food, the only way to make sure you won’t have a reaction is to never
taste, touch or even smell the food.
Moms who breast feed their babies might keep the babies from getting food allergies. Another way
to keep babies from getting food allergies is to wait to feed them foods that often cause food
allergies:
• Try to wait until babies are 6 months old before you give them solid foods. Wait until they
are 1 year old before giving them milk and other dairy (like cheese and yogurt).
• Toddlers should not eat eggs until they are 2 years old.
• Children should not eat peanuts, nuts or fish until they are 3 years old.
Talk to your doctor about a plan for introducing these foods.
To read the rest of this article go to
T h e A m e r i c a n A c a d e m y o f A l l e r g y , A s t h m a & I m m u n o l o g y