Allergy tests for Harry

Harry has unfortunately been throwing up on a semi-regular basis: on three out of the past four weekends, he threw up one time each weekend... except for the three-day weekend, when he threw up twice. (He didn't get sick on our wedding weekend, but he did have something that looked like a mild allergic reaction to something, so we're hoping he'll look okay in the photos.) However, he isn't getting sick during the week when he's at school, so we've been trying to isolate what it is at home that might be making him sick. The doc agreed with us that it COULD just be a series of viruses, but we're all skeptical.

We thought it might be soy - he drinks much more of it on weekends than he does on weekdays, and when we took him off soymilk for the week of the wedding, he didn't get sick. When we put him back on his normal weekend dose, he got sick again. Then we took him back off it and he got sick after eating a burger that we later found out was made with soybeans. So we thought we had a smoking gun for a soy allergy, but took him in to the doctor to see what they suggested.

They took blood to run some tests. The results for Celiac's disease won't come back until next week, but the doc said she doesn't think it's very likely that Harry has that. But the good news is that the general bloodwork (hemoglobin, white blood cells, electrolytes, liver function, etc.) all looks fine, and Harry's test results didn't show any allergies to any of the following (the normal battery of allergy tests for toddlers):

dogs
cats
cockroaches
house mites
egg whites
codfish
peanuts
soybeans
wheat
shrimp
walnuts
milk

and a few other environmental things like cladosporium, which we think is a kind of mold.

So we're thrilled that he isn't testing positive for any allergies, but still confused about what could be making him sick! Now we're keeping a food journal for him over the next few weeks and look for any patterns if he gets sick again - any foods that might be triggers, or any associated symptoms. Hopefully, any pattern will show up there... or even better, maybe it will just not reoccur.

We're going to keep him on ricemilk for the next several weeks and then try to slowly transition him to cow's milk (he doesn't like the taste of cow's milk, or we'd just have him start drinking that right now, but we're hoping we can get him accustomed to the taste if we mix it with ricemilk). If for some reason, his system isn't happy with the soymilk even though he's not showing an actual allergic reaction, we hope that getting him off of it will let his system calm down enough that it can deal with the normal amount of soy we all get in our normal diets.