Given that Harold seemed very at home in our house, I'd suggest house-dust mites is very likely. (Dairy and wheat are very common ones, too.)

The beconase should reach your sinuses in a couple of weeks. Takes a while to get the inflammation down, I believe. Welcome to the wacky world of allergies!

Have you tried kurosaki_clinic and bleach_yaoi? I know what you mean, we really are spoiled in Saiyuki.

Glad to have given you your new fandom, though. Any pairing preferences yet?