See a doctor! Don't you guys have free healthcare?
My uncle had a problem a few years back where it ended up being something odd with his vocal chords stopped vibrating or something. He went 3 weeks without seeing the doctor, thinking it would just go away. Ah, here's what he had I think:
http://www.medicalnewstoday.com/articles/188993.php
Not saying you have that but I'd go see a doctor.