I am finally back to normal. Mine started 2/01/23 with covid. I keep a symptom journal and what I do to relieve it. I was 90% better 4/1, then wrote 92% - 4/2, 97% - 4/3, and 98% - 4/4. Then I pretty much forgot all about the phlegm for five days until it was a little noticeable 3 days ago. It might also be two steps forward, one step back. I haven't noticed it the past 3 days, so hopefully it is over for good.
The point is that it might take a while, but you will get better! Keep a journal so you will know how far you have come.

If this is similar to what we are experiencing, I am just thankful that this "gummy" phlegm is in the throat area, and not in our lungs. Scientists are developing something that could help with this, hopefully sooner than later. I know how crazy this feeling is in your throat. I really want to encourage you all that you will get through this! Hugs.