I Have Been Spitting Up Clear Slightly Thick Mucus For

I have been spitting up clear slightly thick mucus for 3 weeks. To the point I feel like I am chocking on it prior to spitting it out. I usually spit out this mucus for 1/2 or longer. In the mornings the mucus can be yellow. I am sleeping elevated so as not to feel like I'm drowning from my nose into my throat. Drinking plenty of water. Feel like I have dry mouth and throat. Using throat lozenges. No sinus pain. No chest pain.