Permanent phlegm in throat

Anybody else get this? For me, it’s a sort of resistance in my throat as I’m swallowing. Quite often when I drink warm tea, it’ll loosen it and I’ll start gagging and trying to bring it up. Every time after I wake up, I have to spit out a load of thick yellow liquid, which I haven’t been sure whether is due to this phlegm problem, acid reflux or both. It’s slightly maddening because i don’t know how to help myself with this. I had covid a few weeks ago and so it was actually nice to have an explanation for once lol, even though it was happening pre-covid too.