Continued Post-Nasal Drip and Constant Mucus in Throat

I have clear sticky saliva that gets stuck in the back of my throat since Covid last year. Its worse first thing in the morning. It wakes me up at night. This is NOT sinus drainage. I've been to 5 doctors and had my mouth cultured. All came back normal. B12 was low. I rinse my mouth a lot, scrape my tongue to get this stuff off several times a day and drink a lot of water. I was told to use Listerine to keep bacteria done. I have been on so many things and nothing has really helped. Personally, I think this is due to long Covid. I have been battling this since Oct. 11th of last year. Praying for you and I am so sorry you are battling this.

I have never been diagnosed with Covid but received 2 doses of covid vaccine in April/May 21. Since that time it seems I have had this same chronic feeling of pflegm in the throat and constantly swallowing and never goes away. I am wondering if others that have had the vaccine and have also experienced this problem. Now 18 months later I am still struggling with these same symptoms.

hello,
male 43 yo. otherwise in good health. never smoked.
about 12 months ago, I have been exposed repently to a high temperature change (from a 18° when I was abroad, to 30° back in my country). At the same time, I got covid.
those days, I sarted experimenting post nasal drip: mucus from the back of the nose that goes down to throat. From there, never passed completely. I still daily, experiment this.
I noticed that it gets worse, as even before
- when exposed to humid cold.
- when eating HOT food (hot milk, even pasta)
but now, something more completely new to me, it gets worse:
- when eating SUGARS, even sweet fruit (apples)
- Ice creams are the thing that get me the worst.(in fact they are sweet cold and humid)

But, oddly enough, NOT when eating sugar melt in a cup of water...

But even trying to avoid sugar and all of the above, the post nasal drip isn't completely gone, and in any case I start eating again those foods, it gets worse again.

I tried also to replace milk with soy milk or coconut milk, but sill I have the problem.

oddly, the sun, that always makes go away the post nasal drip when I had flue... does nothing at all in this case.

The specialist of ears/nose/throat who visited me, gave me some steroids nasal spray (Beclomethasone) to do for one month and repeat when neessary, but I had no benefits at all.

I was reading too that there is a "turbinate hypertrophy" that can be caused by high temperature change (like happened to me) and that causes post nasal drip, among the other things, but the doctors who visited me didnt tell me I had that. Moreover, it should cause problem to respiration, that I dont think I have.

Searching the web, some say that persistent post nasal drip may be caused by fungus, that live with sugars, and suggest to avoid sugars and eat cold liver oil, that boost immunitary system and is fungicide. but still I have the problem.

Has anyone had long term post nasal drip, after sudden temperature change/covid? or that get worse eating sugar?
and how did you solved it?

thank you!!!