Likely to have CSF RHINORRHOEA.

I had a condition since my birth. A cold with lot of mucus coming out just after a high pain inside the nose. When getting older it became more frequent. First it was once in several months. But, it became once in every month, every week, and now every day for 2 to 3 times. Can't work, can't study. Went to doctor. He(physycian) gave me "montelukast and levocetirizine" as medicine for 10 days. It stopped soon after having medicine. But after 1 day without medicine, it appears again. Now i am having this medicine everyday for about 3 months. My doctor told me that no side effects are here and its no antibiotic. Also, he told about the condition of "CSF RHINORRHOEA". He said he doesn't sure of it. So i need to consult a senior doctor in medical college. Can someone here help me.? If it is CSF R, what should i do.? Could it be something else.? Does any other medicine can stop this.? Please answer this with your kind attention.. Thank you!