Junoa,
I have extreme allergies myself, and have been living here for the past 20 years nearly every single day - so an epi-pen and Benedryl are common things I carry.
Allergies are treated quickly and responsibly here as they are in most places - Royal Medical would be probably the first place I would head if I was having a serious reaction - it is in Sav -about a 22 minute drive. Call the doctors at each of the local clinics as listed in Bnewb's post and ask to have their cell phone number handy in case of an emergency.
And from personal experience, if you are near a pharmacy - checking with the pharmacist can often be the quickest way to solve some of the worst problems you might have. Feel free to call us if you have questions when you get here - 423-5479.