Hi, I hope you can guide me. About once evry 2 weeks, especially when I m upset while eating, I feel like a block of phlegm is stuck in my esophogus. sometimes cant breath momentarily because if it. then i am extremely uncomfortable and feel like i want to regurgitate the phlegm. It s gross, and becomng very disturbing. what causes it, and what kind of doctor should i go to for this?