Is there any danger with sleep walking and talking?

I am a sleep walker and talker and have been from a very young age. (About 4 and a half years old.) I have been told that if I get woken up while I’m sleep walking, I can be scared to death, literally. I have heard that I go into some sort of shock, not realising where I am or who I am. Is this true? Is there any other dangers?
Please Help Me.