Spontaneous speech is gone?

Spontaneous speech is gone? I feel like my spontaneous speech is just irreversibly erazed.Even I have to say something trivial I overthink it and my self-confidence regarding speaking is at at an all time low.It is difficult for me to start sentences and even if I do,I am always subconsciously aware of the fact that I might block halfway through,revise the structure of the sentence or just abdicate because it would take too much effort.It is so mentally draining,I wish I could regain my spontaneity.