On the plus side, most law is practiced outside the court room. Besides speech therapy, have you thought about seeing a counselor for the social anxiety? That might be worth checking out, since hopefully you'll be more confident in yourself and less nervous, which will help with the speech. With making through undergrad presentations, I'm not in a position to give advice. I hate giving presentations, mainly because of my speech but also because I never learned how to be an effective public speaker. I feel like my intro classes had presentations, but not my upper level ones. Maybe you just have to get through this hump?