I don't know how much this will help you as I am only pregnant and not nursing. But I have the WORST allergies, sometimes life seems unliveable, and I just want to shut myself in a bubble or something. Anyways on the off chance that it would work my mw prescribed me diclectin which is the only safe-for-pregnancy anti-mausea medication. She told me to try it because it is comprised largely of an antihistamine, and it definately helps. Just thought i'd throw that out there. I have no idea if it will affct your milk supply etc. but its supposed to be *really* safe.
P.S. I'm in Canada too.
P.S. I'm in Canada too.