Can stammering be treated?

I have been stammering since i was a kid ( i'm guessing 10 or 11). I always avoid public speaking, and any activity that will put in the spotlight. My parents know about this ( I think I got it from my dad because he stutters and so did his late dad). I am almost 20yrs old and sometimes this makes me sad because during job interviews it get worse, I also avoid classes at my university that involves presentations because i feel i'm going to embarrass myself. my mum says its a phase but i dont think so coz im getting old and i see no improvement. whenever I get nervous and really tensed up it becomes so bad like i cant say anything. can stammering be treated ? and can it be heritable ? if it can be treated where can I get help?