As a person who stutters, I was also devastated when my second kid(who speaks very clearly and in a very advance level first started forming sentences), when she was 3. But then I changed my attitude in my mind. As our speech therapist said positive attitude is everything. My husband can sometimes struggle to give her what she needs, but it’s very easy for me because I struggled the same thing. Whatever the parents tell the kids about themselves, it becomes their inner voice. One time I give her a cute little feedback about her speaking, smt like “you’re talking like crickets”. People in my home country usually tell this to little kids who talks a lot and who talks in a cute way btw. And now it stuck on her, she speaks so much and when we tell her, just stop a little or smt like that, she says confidently “I can not stop because one time you tell me I speak like crickets” and just laughs. Our speech therapist mostly focused on self esteem and some on her self realization when she struggles and make her to slow than “by herself” if she feels comfortable with that, if she prefers she can stutter and than she usually says that was a bumpy word and just laughs