Help please...Faith & others with food/chemical sensitivity

As I've mentioned, I've been on the failsafe diet for almost 5 wks now and have had improvement, but def. up and down days. (Granted, I've also had a few things that aren't on the diet esp. this past wknd and realized I shouldn't have).

Today has been a down day and I felt like I've struggled to breath with nothing causing it, just sitting at my desk. (Though I did come across some sort of industrial spray in the office today and tried not to breath in). But it wasn't terribly strong, and I moved right past it so wasn't exposed long. The other thing I did today was try to increase my dose of my herbal antihistamine, and right off the bat, that gave me a weird feeling.

Typically the breathing issue would be in response to food. So I'm freaking out a little bit. Did anyone else experience this?

Faith - I know you said at one point you needed a mask. I certainly hope I'm not at that point, but am curious to know what triggered that for you?