28M stutter that causes me to pause or prolong words on certain vowels.

28M stutter that causes me to pause or prolong words on certain vowels. Ive always been the guy that talks too much, but when it comes to pronouncing certain vowels I either pause or prolong the word. When i pause it feels as if I am out of breathe and I cannot breathe. When i prolong it, I feel like its tough getting out the whole word. IDK, I always been in customer service jobs, But i am able to mask it by knowing my limits. When it comes to repeating words or someone putting me on the spot, my stutter always shines.