Concern) My saliva is sticky, so I keep spitting it out.

I'm not sure if it's sticky saliva or thin phlegm.

Sometimes I feel a choking sensation as if a foreign object is stuck in my throat, and my saliva is sticky enough to make swallowing difficult, which causes discomfort. As a result, I keep spitting, and it has become a habit, making swallowing even harder now. I rarely catch colds and seem to be in good health overall, so why is my saliva sticky? I think I drink about 1.5 liters of fluids daily, which should be enough. Should I drink more water?