No stutter when talking to myself in mirror.

No stutter when talking to myself in mirror. I have had a stuttering problem since I was a child. Stammering, blocks, and stuttering have been the main issues. One thing I’ve noticed is that when I talk to myself in the mirror, I don’t have any stuttering problems. Words come fluently and easily. There’s no throat pain or burning sensation in my head when speaking—just a clear mind. Could this be due to self-confidence? Anxiety? The pressure of making eye contact with others? Could this be purely a psychological issue that can potentially be fixed? I would say I have low self-esteem, low confidence, and anxiety. I’ve started practicing every morning by talking to myself in the mirror for 2–5 minutes, and I can say it helps.