I know your struggles. I work in psychiatry. I have a really bad time in my life right now and my stutter is extreme. Im constantly doubting myself and fear that people judge me. I feel like a patient sometimes because this is making me socialy anxious. Today a worker from another floor came and asked a simple question, I freeze and started with my usual stupid fillerwords like "uhm uhm I, uhm uhm..." He looks at me like wtf chill bro. Im doubting my carreerchoice, but I think you have a harder time as a teacher. I could never cope with the stress of being a teacher considering that our stutter lives a life by its own, so all creds to you for fighting it! But you need help, you cant do this alone. I never know if tomorrow is gonna be a fluent or horrible day. I recommend you to take medication to try and treat your stutter. My stutter is very related to anxiety. Paxil and Citalopram have a good record in stutterers. Even a betablocker like Propanolol could help you!