I thought I was going insane, but this is exactly what happened to me too. At the end of last year and the beginning of this year, my confidence in my speech was rocket high, so high that I began working in a call center. I was somehow taking calls and not stuttering at all, from my verbatim greeting to closing calls, but I grew sick of speaking and hearing my voice over and over again on call recordings and just talking in general. I think ultimately it hurt my speech confidence, as I gradually was less able to converse with callers and friends. I then quit that job and I still sometimes get flashbacks and deep thoughts about what could've went all wrong. Do you feel pressured at your job? Pressure to perform? That's how I felt every day all day. I really think you need to destress from your job. Is it possible to just chill out for a week and hang out with family and friends?