My kids have celiac, as do I. They are 4.5 yrs and 18 months.
Their symptoms are so all-encompassing it's hard to list! So here's a shot, but with a glutening, it could be one symptom or twenty that show up.
diarrhea
constipation
headache
stomach ache
vomiting
hyperactivity
anxiety
obsessive-compulsive about orderliness, routine, food
aggressiveness
decrease in conversation/vocabulary
bed wetting (in 4 yr old)
reversal of potty training (in 18 mo old)
rashes
screaming, crying, moodiness, tantrums for hours
fever
canker sores/cold sores
weight gain (in me)
weight loss (in kids)
I was diagnosed when ds was 7 months, ds was diagnosed at 17 mo, and dd at 4 mo when she got ahold of a cheerio and threw up for several days. We found out ds had it after he was diagnosed with ricketts (from the malabsorbtion) I had trouble getting drs to see a problem with his severely bowed legs and they didn't want to think of celiac because he was such a big baby.
For a long time I felt like we had to live in a bubble. We couldn't go to people's houses, church, school... or trust grandparents or sitters with his diet. Every visit with the grandparents meant a week of sickness after. We made our home gf and made visitors wash hands before playing. We hosted playgroups rather than go to other's homes. Things started to get better when he turned 3- I found a preschool willing to go gf. They had kids wash hands upon arrival, and I supplied gf playdoh, gf pasta, gf whatever. They did cheese and fruit/veg for snacks. The other moms were great about it.
Now we homeschool. I still feel at times like I want to scream- we are back to the "can't go anywhere" with dd, who eats everything off the floor, touches everything, and chews on her fingers.... so we are back to no sunday school, bible study, playgroup at other homes, or any place with food.
BUT I know that it will get better as she gets older. Ds doesn't go anywhere without me yet, but can handle himself so that he minimizes his chances of glutening (hands out of mouth, wash hands often, don't take food from others, don't eat food that has hit the floor or been even touched by anyone else. Celiac isn't why we homeschool, but I am certainly glad not to be braving school with this! But there are ways, I know people do it- in fact I had a student with it, back before I found out I had it.
Karate has been great for ds, as there is no food allowed anyway. He can let down his guard a bit.
I got stickers from nurserysafe.com that are big, green circles that say something like FOOD ALLERGIES. I used to stick one on his back and one on his front (plus give him one to stick anywhere he wanted, with the agreement that he leave the other two put). Worked great. Now I use them on dd's back, since she won't leave one along on her front.
Have you been to celiac.com? They have a board with a forum for parents of babies and kids with celiac. Plus Wheat Free Worry Free and Raising Our Celiac Kids by (I think) Danna Korn are both very good.
Don't know if this tells you anything you are looking for, but there you go! It's an ongoing battle, you just do what you humanly can and forgive yourself the rest.