I'm 15 years old & i'm suffering from puberphonia.My voice has become a hoarse voice previouly about 3-4 months ago it was only a high pitched voice bt now it has become hoarse.

My therapist told that u keep practicing the voice therapies bt there is no change in the voice.Was this the same case with u all?When i try to sing songs my voice becomes deeper & no hoarseness take place,Is this a good sign?

Can any1 tell me how can i cure my hoarseness & how can i keep using my second voice??