u/Responsible_Sun8044

I feel like a complete idiot. So my daughter who is 8 months already has fpies to wheat. We were introducing peanut butter and she had a reaction on her 4th exposure, she ate a little over a teaspoon of peanut butter. I stupidly did not think of potential cross contamination from us using the peanut butter jar to make sandwiches and spread it onto crackers, with spreading in the bread or crackers and then putting the knife back into the jar. My question is, how likely was her reaction due to a true peanut butter trigger or could the most likely presence of cross contaminated wheat have been enough to cause a reaction?