Need cross country help for asthma?

i'm a pretty advanced runner but I got bronchitis and I thought I was over it but I tried competing last week and I couldn't breathe at all. I went to the doctor 2 days ago and he said I have exercise induced asthma and gave me Advair. I've been taking it for a couple days but I guess it takes a while to start having an effect. Should I try running in a meet tomorrow and maybe use a friend's regular inhaler or is it not worth it? and should i be running at all right now if the Advair hasn't really started working yet?