I think therapy can help in any area of your life that doesn't feel comfortable. And particularly in areas that are important in your career development. This is an important issue for the field you are entering.

Therapy could help you discover what your fear is that shows itself when you have to talk. There's something behind the having to talk.

You might want to call some therapists and ask if they work with your specific issue so that you will know who you want to see when school and insurance starts again. Also, many schools offer some counselling and you may be able to get help there or they may be know just who to refer you to, as I would guess that many others have sought help for this.