Another DILD - Trouble speaking

I was in the music building at my school. I was staring at my old middle school music teacher. It sparked that it was a dream. I tried
saying "This is a dream" over and over in order to help me gain control. I told my music teacher that she wasn't real. The problem was that
I was having trouble saying the words clearly. It was like my mouth was numb and I was stuttering and jittery. I moved closer to
my teacher to tell her that she wasn't real and that this was a dream. As I walked closer my head started shaking side to side.
The shaking took effect in the physical world and then that's how I woke up. I went back to sleep and then I blacked out.

The fact that I had trouble speaking made me feel not confident. I have this phobia where I don't like being silenced or I have this fear that one day I won't be able to speak my mind and that I will be trapped in my body forever.

I want some tips on how I should overcome this. I understand that to overcome my phobia I have to face it. But I don't know how?

Facing your phobia in a lucid dream gives you the opportunetiy to experince the situation in a controlled environment where you can practice your response and bulid up confidence to overcome it. It sounds like you might need to build up some expereince with general dream control. By practicing some skills to improve your dream control you should be able to press your will onto your dream and what happens in it rather than the other way around. Try creating an object out of thin air or transforming one object into another just by focusing your intention on it. This will let you improve your confidence in dream control if you are having trouble getting your dream body to do what you want.

You're afraid to wake yourself up. I remember that problem from when I Was starting, it goes away quickly. :)