Oh that's awful. Have you confirmed that it's something seasonal vs. possibly something in the house or larger environment? For example I've had worse asthma problems due to pollution near my office -- concrete dust from parking lot renovations in one building, air pollution from a nearby asphalt plant at another.

I sympathize with the long painful process of figuring out the cause. I spend way too much time playing the "what am I allergic to now" game.