Seriously, to me it sounds like asthma... my son has asthma, and his symptoms with the "noises" when you breathe, sound like wheezing. At the very least, it's serious allergies. I would get a second opinion. And for what it's worth, I would thing bathing your pup too often would be a bad thing because it stirs up the dander... not to mention that it dries out the dogs skin and strips it of much needed oils. See if you can get an appmt with another doctor, and let us know if the two doctors opinions are the same or very different. I can't imagine being allergic to my dogs, but my son has pet dander allergies, and is very allergic to cats, but his symptoms aren't as bad as what you are describing.
It sounds like and allergy. I was told their is something called allergy induced asthma, by my doctor. What will help a lot is an allergy pill, like Allegra or Claritin(24 hours). Plus, the environmental suggestions the other person posted. Try them and see if they work for you. Benadryl is great but only works for 4-6 hours and makes you very drowsy.