Post covid vaccine helth issue

Hello my name is George i have 29 years i live in uk in Coventry, i have this realted problem from about 4 years, i have very sticky saliva i feel like i need to spit it out all the time if i swallow it it comes back, i have the sensation most of the time that something is stuck in the back of the throat ,sometimes i cannot swallow the food so i dont eat for 2-3 days sometimes, i have tried everthing, first i was diagnost with inflamated throat tonsils, then with gerd and then with acid reflux, i have done endoscopy and several blood tests, i have tried diffrent treatments even diffrent oils and nothing helped, from antibiotics to esomeprazole etc. My life is been horible since 2021 and i feel like i will not be back to normal again. Does anybody had eny positve results with any treatments? Please help any advice i will apreciate it a lot. Thank you