Another thing that might help is improving the condition of your air. It's funny how many people actually don't realize their air is so bad for them. I found with a little research that the air inside your home is actually a lot worse than outdoor air. It is actually very bad for your health if you don't take care of it. I used to have to deal with a lot of junk all the time, but after I took care of the air in my home I don't have this problem any more.
What's helped me is a whole house Polarized Media Filter. What it does is it actually creates an electric field which attracts the particles to the filter fibers. Well, it's really helped me out a lot. I've done enough to know about this, but I didn't think I'd run all the technical terms by you.
The best place for price that I've found is at www.airlifeone.com. Plus, I've never had a problem with their HR when I had questions. The air you breathe indoors is a problem, I know it's a lot that you can't see, but there is a lot of junk in the air that you just can't see, but that you'll notice when you start filtering it out.
I hope that this helps you out.
Have you tried grabbing Claritin or something over the counter? You're describing my hay fever exactly. One thing I did that really helped (based on a dr. recommendation) is I started taking my daily dose at night, instead of the morning. The difference is amazing. I wake up feeling a lot clearer and the head-aches are pretty much gone. This has been the best year I've had (supposedly in a bad pollen count year) in 5 years with that switch.