Hello everyone, son is 2.9 years old, says mom, and once said no and t…

Hello everyone, son is 2.9 years old, says mom, and once said no and that's all, he goes to kindergarten, at home I remember all my actions from one try and repeat it, since 2 years old and until 2.6 we took him to speech therapist, then went to kindergarten and stopped taking him, what happened to you guys then when they started talking?