I get my throat stuffed with mucus — how can I make it stop because it doesn’t let me sing.
The best thing to do is go to a doctor to try to determine the cause, whether it is allergies, acid reflux, post nasal drip or something else. The doctor will recommend treatment for the cause and perhaps something to thin or dry the mucus in the meantime. You might be able to change your diet or some things in your environment. You can also steam, use a neti pot and gargle with warm, lightly salted water. You can also read the suggestions under the answer to BLOCKED NOSE.