El Supremo,
If the GP agreed that you no longer needed asthma medication why on earth did he prescribe you more medication? Furthermore why did you accept it? Surely the lawyer training you have received would help there, or is the GP a more persuasive orator than you?
If I were you I would seek out specialist advice and if the specialist says you don't have asthma then you will be able to take that to the medical board.