Sounds like it's not properly under control. My asthma clinic gave me some tips and my usage of the Blue one is down by a huge amount. Like others a pull of the Blue one if I'm feeling at all 'tight' before I ride works a treat.
Thats exactly the problem, from what I can make out of posts.
Put trust in what the Asthma nurse says becs, the more regimented you become in using a "preventer inhaler" the less you will need the reliever. Its not instant results keep at it.