Is it normal to become temporarily mute under certain circumstances?

Good morning/afternoon/evening to the funky beans reading this,

I am cactus. You can call me cactus. I am currently a student in middle school.

I am rather incapable of talking to strangers face to face, no matter the situation. My fear of social events can range from being reluctant to express my opinions during a class discussion with students I am not familiar with; to breaking down inside of a restaurant because I simply cannot open my mouth to say the name of my order and always have the assistants wait for a few minutes.

At times I might become very agitated or go completely mad if other people continuously urge me to speak. Several teachers of mine had already expressed their concerns to my parents that I might have ASD. However, my parents don't believe so and neither do I, since I can communicate normally at home or with friends. I also don't have any trouble performing individual tasks and I am quite an academic student. But still, I would like to know about your opinion on this.

Furthermore, I have this problem which troubles me by a lot, which is that I cannot address anyone by their names (even if they are close). Having to say someone's name makes me feel anxious. I don't know if this is unhealthy or not.

Anyways, thank you for your time.