Wow, sorry your allergy is so bad Jen. I think the Sphynx (hairless cats) aren't hypoallergenic unfortunately according to what I found anyway:
"While they lack much of the fur of other cat breeds Sphynx cats are not necessarily hypoallergenic. Allergies to cats are triggered by a protein called Fel d1, not cat hair itself. Fel d1 is a protein primarily found in cat saliva and sebaceous glands."
I hope you can figure out a way to eventually have another cat or a dog, maybe a pig? I think the little pigs make very good pets too.