Help me out.

Help me out. I am 20 years old, i have been stammering since i was 3-4 years old. I stammer very badly now. Every day for me is like fighting a battle without a weapon. I am going to get admission in university in near future. My biggest fear of that is giving your introduction on the first day in front of the whole batch, and also giving oral presentations, kindly help me out how can i make it better because i cant take any more humiliation, i am done with it, I'll risk my future for it if it doesn't gets better till than, And every second I'm having suicidal thoughts.