I can feel your pain been there :). It is not easy for you i understand you. Went trough all this and here i am still standing with my head up. There are those days that will make you doubt yourself and there come better days. I went to a college where i had to have many presentations at least 16 in one year it was really pain in the ass, but i made it as you will too. It is not abouth them it is about you and your future, and you are killing it you are getting closer to your goal. Those moments had been hard for me so i really understand your pain but you will see years from that you will realise how brave you were that you stood up and make it through. I have a job now related to my study i have great coworkers, the payment is not wonderful but i have enough to eat i can go somewhere so yes im happy. Dont be ashamed of that i understamd that you ste i still am sometimes too, but i realised that stuttering is not defining who i am, i still do have hard times from time to time but look you are just another human being like everyone else we all have our faults some of them you can see right away, and some of them ate more easy to hide, but youll find them at every person when you get to know them better. Dont be to hard on yourself and celebrate your life :).