I AM HAVING COUGH FROM LAST 2 MONTHS

I AM HAVING SEVERE COUGH FROM LAST 2 MONTHS I DRINK MANY COUGH SYRUPS BUT NO SIGN OF IMPROVEMENT I DRINK MUCOSOLVAN MANY TIMES I GET RELIEF BUT AFTER SOMETIME AGAIN I BECOME ILL.I HOPE I WILL GET ANSWER OF MY QUESTION AS SOON AS POSSIBLE BECOME I AM VERY ILL