I Have Been Suffering From A Cough For Over 2

I have been suffering from a cough for over 2 weeks which has progressively worsened. At first I believed it to just be part of the cold I had, however the cold has gone but the cough persists. It has now gotten to the point where I am retching when I cough and sometimes vomiting from the pressure. I had a cough very much like this last year which resulted in panic attacks but all I was told was I needed an inhaler. Please can you help me?