This is very common. I have had the same problem for years. The pressure becomes greater when you need to repeat what you just said. As a speech pathologist I have spent years trying to find a solution to my stuttering. I chose a pathway to fluency by researching as to why fluent speakers don’t stutter. I discovered the Valsalva response to research which eventually led to fluency. This is the pathway I chose it may not work for you.