I have this mucus and sometimes burning in throat, I am constantly clearing my throat.
try benadryl severe allergy and sinus headache, what happen is that you are having post nasal drip I find that work good for me and also cough syrup that will bring up the mucus I use vicks casero they both work good together but on the box of benadryl it said take two I take one because they put you to sleep
does it get worse and night and when you lying down?
if yes,
then it sounds like you might have a post nasal drip?
The only effective way to treat it is to get a cortizone nasal spray from a doctor (but you can only get in on perscription)