Can post nasal drip be a symptom of something more severe? I mean besides the usual allergies or what have you. I've had post nasal drip for over a year which has slowly progessed to an enlarged tonsil with, what I've heard as being called, tonsil stones coming out of it and later on the same side, an enlarged lymphnode which is larger sometimes than others, on the same side. The family doctor didn't make a big fuss and treated me with antibiotics and antihistamines and nasal sprays like it was a sinus infection that resulted from allergies but the treatment didn't help and they said they could refer me to an ENT DR. Should I be worried?