Definately click on the "Diagnostic Tests" in the post above...and ask for the full celiac panel ASAP (before changing his diet) If he is in public schools, you may need the firm "celiac" diagnosis as a back up to protect him. (Its good that your dr asked you to look into it...mine talked me into less than I wanted and then ran the wrong gene test, )

Once that testing is done you can decide whether or not to follow up on further testing, or skip to an elimination diet.

I do want to ask, just out of curiosity, did he react to the pertussis or the tetanus component? Did you try the dT shot without the aP? (Its usually given as DTaP) I'm asking because multiple family members react to the Tetanus portion of the vaccine. Its exceedingly rare. My reaction involves partial paralysis...scary. I didn't let dd get that far Anyways...I was just wondering if I've "bumped" into another member of the theoretical population.