I know that trader joes is really good about there facility is run and how cross contamination could happen. I always ask further questions and they direct me to the right people. I know I am extremly sensitive like you are... I even reacted to trader joes french style green beans that were made on shared equiptment with wheat.
How about stores that carry fresh fruits and veggies, and there is a bakery there would that even be safe??
I try to wash all of the veggies and fruits really good. I try to do my best but still end up getting sick.
I hope this helps you out!