You searched for: “laliophobias
laliophobia (s) (noun), laliophobias (pl)
An abnormal dread of talking and speaking: Timmy suffered from a laliophobia because he was so afraid of forgetting what he wanted to say, and of stuttering or fumbling over his words.

An individual's difficulty in verbal communication may be aggravated by situations that arise from anxieties or fears of self-consciousness.