I have had post nasal drip for about 3 months now. have been on antihistamine, nasal sprays, flu meds, you name it but nothing seems to help. what can i do to stop this constant clearing of the back of my throat? no coughing no other issues.

Postnasal few causes: Sorry to hear you are suffering...this can have allergic or non-allergic causes. After 3 mos. worth of symptoms, I would see an allergist for skin testing to determine cause. There are 3 different types of prescription Nasal sprays..you can probably get benefit from one you haven’t used yet. Also try saline rinses daily(like Simply Saline).