I really want a yorkie...?

If the doctor said you would be okay around any dog, then you should be okay with a yorkie. Find a breeder near you. Ask to go and visit with them to see if you are affected by being around their dogs. Or just go to a friend or relative's house that has one if you know of someone. Spend time around them tro see if they are too bad for your asthma. Yorkies are good, loyal, loving, small dogs make small messes, eat less than big dogs, very smart. If you can find a local breeder you won't have to pay airfare so y7ou will be saving money right there and it is always best to buy local anyway. I hope you get one soon.