I have a similar type of problem. I dont stutter but repeat whole words. In German its known as "Poltern" dont know whats it in englisch tho The way i handle it is that i just pause for a second and take a deep breath and try again. Pushing through is almost always annoying for you and others. Nobody will judge you for breathing. Also its important to know what is causing it. For me its lack of sleep and stress. Also the more human interaction I have, the better it works for me.