Sneezing regularly

A potpourri of common ailments and possible herbal remedies. 

I HAVE been suffering from sneezing and runny nose for three years. It occurs two to three times a week. Every time I consult a doctor, they tell me it’s only an allergy. Only one doctor recommended me to take medication. It’s effective but it is too costly in the long run as it’s not meant to cure but just to alleviate it.  

I’ve stopped taking it since. My condition worsened when I started to sleep in an air-conditioned room. My nose will be blocked and I will have difficulty in breathing. I’m having sleepless nights due to this. Is there anything I can take to cure it completely?