And have you noticed a spike in your stress levels, or sleep deprivation over these past 3 weeks? Has there been a change in your normal, or work life that has made things uncomfortable for you? Is your mood/attitude towards working different than what it was 3 weeks ago? Small things can trigger this stutter. I know when I'm anxious at work, moreso than usual, or hungry, or sleepy (especially sleepy) I trip over words I usually wouldn't.