So you do have a peak flow meter? My allergist and I have never discussed what my peak flow should be for my age because it doesn't matter any way, I'm never going to get there. I take it I'm much older than you, I'm 56.
If you have a peak flow meter, you will know what I'm talking about. My green zone is 400, yellow zone is 390 to 200 and my red zone is 200 or below.
I think it sounds like you need a nebulizer and I am serious about how much the Xopenex inhaler has helped compared to all the other inhalers I have used. I haven't had to use my nebulizer as much since I got it.
Good luck to you and please keep us posted.