Your not alone buddy! Treat your self with an icecream and enjoy the sugery goodness. Practice makes perfect. That's all it is. Ask your teachers if you can give presentations in smaller groups, or just the teacher(s) and practice. Build up your confidence and experience with speaking in front of a class. Replace those bad experiences with good ones. I have the exact problem as you have and i can say, it will get better. Put your ego, or thoughts you have of what other people may think aside because those are useless thoughts. If you want to know what people think ask them. It's not your job to think for them. Take things with a grain of salt, make a joke, or something to take the seriousness (pressure) of the presentation. The more focus you put on your self to speak better the worse it can become. (This differs per stutter, i find it works for me) As always have fun doing it. If your not having fun, make it fun.