Sticky throat. And white tongue coating?

Hello Doctor, I have been facing a persistent issue of sticky throat, especially in the morning. When I spit after waking up, thick, yellowish, thread-like mucus comes out. Sometimes, I also notice small round food particles along with the mucus. While swallowing, my throat feels coated and sticky. My tongue is always whitish with some rashes/patches and feels heavy. Occasionally, I notice slight blood in my spit while brushing in the morning. I had last year treated H pylori , but symptoms still persist. Could this be due to throat infection, sinus issue, acidity (GERD), or something else? Is it related to my previous H. pylori infection? What could be the reason for food particles in spit and white tongue coating? Please suggest possible diagnosis, required tests, and treatment. Thank you.