I've lived with a dog for most of my life, starting when I was 4 and we got a German Shepherd. I've also had allergies most of my life, notably dust and pollens.
An ENT consultant referred me to an immunologist for testing, as he thought it might make it easier to prevent my chronic sinus problems. Among the (very many) things that caused a reaction was dogs! I had absolutely no idea, and I was definitely no better when I had lived in a dog-free house.
My next dog came from a non-moulting breed (Lakeland terrier), as I thought it might reduce the reaction. I was more allergic to him than I was to any other dog I've ever met, and is the only dog where I have really noticed a reaction. I concluded that it was the dander in the coat and not the hair, and used a spray called Petalcleanse D on his fur which helped massively, and wore a face mask when grooming him.
I now live with another dog from the same non-moulting breed, and she doesn't appear to affect me at all. I've also never had any reaction whatsoever to very short-coated breeds like greyhounds and whippets (which is fab, because there are few things nicer than nuzzling a whippet's neck
), to my friend's Tibetan terriers, to Schnauzers or to any cockerpoo.
Based on my experience, I think dog allergies are bit more complex than just being allergic to all dogs. I'd suggest going to Discover Dogs (in London next weekend, and at Crufts in March) and actually seeing how you react to different breeds.
And never, ever get a dog at a busy time of year like Christmas. They need to be introduced to their new homes at a quiet time, where they can get used to it gradually and not be over-stimulated or freaked out by lots of activity and people around.
I couldn't live without a dog in my life. God knows what I'll do when I'm told and decrepit to look after one properly.