i too have this thick stuff in my throat 24/7 and have tried pretty much everything, i am so sure it's coming from my gut, i have tried acid reflux med, even by a prescription and it did not work, for me that's not what it is, it gets so bad it ends up in my sinuses so i work to keep that cleared out with my navage...but it never leaves my throat..never, i have been dealing with it since i had covid over 3 and a half years now...i have slept sitting up, still just as bad sometimes to the point of gagging, does not seem to matter what i eat or drink anymore....it's like i have wood glue in my throat....i can do little things to kind of calm it down but it is ALWAYS there...it gets exhausting...hang in there...