I can totally relate. Just when you think you have a handle on it something else pops up. We have been so carefull with ds and his peanut allergy. He has had one horrible reaction since we found out about it. No products in the house and no eatting out. No problem, right? Wrong!
Last night we headed to the grocery store for a family outing (Sad, isn't it)
We were almost done when we remembered we needed popcorn. Right next to it were the peanuts and trailmix snacks. I didn't think much about it until two minutes later Ds started complaining his face itched. I looked at him and his eyes were bloodshot and his face was all red and splotchy. He had picked up a sealed container of peanuts.
After we got him dosed with Benadryl and made sure the reaction was over I started kicking myself too. Something so obvious.
Just be glad you asked and never stop asking.