Aye carumba!
So is this the regular spray that cashiers use when they spray the conveyor belt?
I've had cashiers spray that gunk right in my direction when I'm standing in line. I found it annoying, but assumed it was probably just some non-toxic cleanser, considering so much food goes on there and all.
But it turns out they're using toxic cleaners on it?
Various types of produce have bags that are like mesh (onions, oranges, etc.), so it's disturbing that grocery stores use a toxic cleanser on the conveyor belt.
I know meat leaking can cause an issue, but there must be something safer than the cleanser you describe above!
About your question, I agree with CrystalBeach... probably best to ask a doctor. Or another option is to phone Tele-care, where you can ask a nurse:
http://www.gnb.ca/0217/Tele-Care-e.asp
It sounds like a cashier job may be tough when pregnant though. Maybe you could send your resume to a temp agency, because then you might be able to get a short-term desk job that would be easier physically.