When did you guys start stuttering?

When did you guys start stuttering? When i was a kid i was born in Japan, i spoke english at home and japanese outside. During this time i did not stutter at all. But the moment my parents divorced and i moved to Canada, i had AWFUL stuttering. I mean my speech therapist actually CRIED talking to me saying it was the worst she had seen 😭 And its such a strange thing to think about because ever since then ive stuttered! Now its not as bad as it used to be and ive really mostly come to accept it but im really curious! Ive actually started perusing psychology to maybe learn but i realize now im a junior and have heard barely anything on even the subject of a stutter :/