Stutter less after waking up?!

Stutter less after waking up?! I have mild stutter for the past 15 years. I stutter more when I am put in a spot or one can call it consciousness stammering. One interesting thing I have noticed is when I wake up from sleep and/or talk after afternoon naps, I stutter way less. Has anyone encountered something similar? Also any inputs on how to tackle consciousness stutter?