Hi Lisa,
I have the exact same problem, for over 2 years now, started 8 m after my divorce.I am used to it, but hate it, its an awful feeling, it rules your life to a big degree. I have done all kinds of tests with GI and ENT doctors, I started taking medicin for post nasal drip 14 days ago, - it actually seem to help, some days I don't feel anything, an some days just a little. I also take RX Nexium before dinner, and bedtime. How does your throat feel in the morning? Mine seems better. I took Xanax for a while but it didn't help. I even did yoga for 7 months/ 4days week to see if it was a muscle that was too tight. The yoga did wonders for me, but did not help my throat issue.