Help! I am constantly clearing my throat every few seconds. I have post nasal drip due to allergies but allergy meds haven’t helped at all. I’ve tried every one of them. I’ve also tried an expectorant but didn’t help. I’m never able to cough any phlegm up. It just feels like there is the slightest bit of phlegm stuck in my throat but won’t go down and can’t get it up. This has been going on for 3 years and it drives me up a wall.