I have social anxiety, and I believe this is the reason I stutter and have speech blocks. I find that when I am able to control my social anxiety and feel confident in social situations, I usually speak fluently with no stuttering or blocks. I personally think that if I can improve my social anxiety, my fluency will also improve. Like many people here, I also don’t stutter or block when I am alone. It only happens when I am speaking to another person. This is another reason I believe social anxiety is the cause of my speech impediment.