Allergies getting worse?

Lately I have been having some sever attacks.... where first my nose runs... I begin to wheeze...my chest feels very heavy... I begin to cough.. and cough so hard that i almost choke and or black out. I have been trying every form of allergy medication, and no amount I take can ward off these attacks. What should I do?

AJ in Toronto

[National Jewish Health]

I would suggest seeing a physician.  This sounds a lot like asthma and can easily be diagnosed by a good physical examination and a pulmonary function test.  Trying other methods without a diagnosis probably is not a good idea.