I have a 5 years 2 months old son who has cough for the past two months, i tried all homeopathy, now what to do?

Allergies?: I'm not sure whether you tried various homeopathic remedies on your own, or if you took your son to a professional homeopath. The 2 are vastly different, especially if you have no training in homeopathy & the problem is chronic -- like a 2 month-long cough. Please consider taking your son to see his pediatrician for an evaluation. A professional homeopath can still work with your son at same time.