hi i was diagnosed with asthma about twenty years ago when i was 23 yrs old,now my asthma nurse thinks because mypeak flow is so low all the time- it ranges between 280-200. that i may not have asthma and wants me to a peak flow diary for 2 wks and then she says she will be able to calcuate the results and work out if i have asthma ???? how will she work this out for my peak flow diary?? and if its not asthma wot cus b wrong with me??