Try a search on here, 'cos it's been well covered.
Have a chat with your GP about any labels' on your medical records.
Let him know how important the records are to your career. "Asthma" can be quite a challenge to diagnose, sometimes a definative answer isn't always available.
Are you sure you didn't have a "viral wheeze?" (Most people have one at sometime) Records can be ammended. (A littlle more difficult since Shipman though.)
Chat to your doc.
