Re: my family recently came in contact with a pesticide called Bifenthrin which is a pyrathriod
I can't believe your state makes you pay to be on the registry! It would be a good idea to call the environmental health section of your county health department and report the reaction to them. It really sounds like they used a concentrated dose for her to become that ill and the company needs to be investigated.
I was interested in your comment about chamomile helping. I looked it up to see if it might have an effect on the chloride ion channel, and it does: