Hyperventilation - why is it so seldom diagnosed? How can I hep myself?

I found a book in a charity shop and this book describes a lot of the symptoms I and my mother have been getting. I wonder if anyone has been diagnosed and how it has been helped? I think it is a subject worth pursueing. I am a singer and finding it a terrible effort to reach the hgh note and hold on to the long ones. Maybe that is part of the problem.