Courte anecdote à corriger SVP. Merci d'avance :)

C'est bon je pense et derien

During my summer vacation, I used to help my mother. I was her assistant, except one day. Indeed, my mother had to be away and I found myself alone in the dental office. Then, comes a woman with her little boy. At that time, I was wearing my coat, my gloves and my mask (<=> qu'est-ce que tu veux dire par "mask"?). And so, she thought I was the dentist. As she was in a hurry, she wanted me to extract the tooth of her son.

Bonne continuation!