I have tried to accept my stutter but I still want to hide it

I have tried to accept my stutter but I still want to hide it I am a covert stutter and most of the people around me probably don’t even know I stutter. But lately there are words that I can’t substitute that I have started to find difficult saying and will stutter on them. Due to this, I’ve been stressing out a lot. I won’t stutter on those words when I say them alone by myself. But when I do stutter on them, I feel really depressed and upset. I feel like I’m burdening the listener and no matter how much I try to hype myself up and think that ‘hey it’s not your fault etc’ when I do stutter, I find it hard to move on. I think the root problem is caring about what people think of me. Fear of judgement. How do I just let go of this and stop stressing out?