I got a friend whose voice is very deep.. When you are talking
to him his voice is not exactly the nicest piece of tune.. But
guess where i knew him? As a telemarketter! When I first hear him
speak on the phone I was surprised as he can really speak well,
although his voice is not very nice. When he is talking to
customer, the tone of his voice turned into a more attractive one.

So, mayb you can try building up the way you speak to be like those
profesionnal people? Know who I mean?
Anyway have you been to the doctors? Mayb they could help? Jus
asking.. 