Sounds like you will get good advice from your surgery, asthma nurses are normally very well trained to deal with your asthma problems and will refer you to your GP if they think you need further investigations.

I have been an asthmatic for 25years, a little tip while using the brown inhaler is to rinse your mouth out afterwards with cold water, this can prevent oral thrush. The brown inhalers can sometimes course oral thrush in some people! I had this problem and it was a constant battle, in the end my GP changed me to seretide which helped more with exercise as it is slightly longer lasting. Seretide is a purple inhaler.

It's also worth trying to find out what your triggers are, everyone is different but if exercise or cold weather is a problem then you may have been advised to take your blue inhaler just before you exercise or go out into the cold. I have found it better to do this as the blue inhaler doesn't always relieve my symptoms.

often when symptoms are under control it is very easy to forget to take the inhalers, to be honest I have occasionally forgotten thinking that I am OK then find I am gasping for breath because I haven't taken the inhalers before going out into the cold. It is far better to try and prevent the asthma then trying to relieve the wheezy symptoms once they start, well for me it is!

As others have said always carry your inhalers with you.
Good luck and I hope your symptoms improve. Another good tip before seeing the asthma nurse again right any questions you want to ask her down that way you won't forget:-) Oh, it's also worth making sure you are on the flu jab list and have a pneumococcal injection, i'm sure your practice would have already done this.
Best wishes Camomile