Am I in the wrong for doing this?

Yesterday I just got back to training with my new coach because I was sick for three days from the weather and when I reached there I found out that there are new members they are beginners and I’m a bit advanced and the coach told them that. But when we started warming up by jogging they were ahead of me because they are in a way better shape than me and I’m still recovering from my illness. And I guess one of them started to underestimate me and he tried to coach me every single time and correct me, I found it really annoying but I kept shut. Then the coach told me and that guy to do a drill where one guy only jabs and the other guy only catches the jab without countering. Everything was fine until he noticed that my right hand was going down so he decided to left hook me right to the face and it wasn’t even a light tap it was a medium hit and at that point my left hook just moved on its own and I hit him right on the chin with a bit of power and then he wobbled and he apologized at that instance I felt bad especially when he wobbled after that hit. And I have been thinking about this until today am I in the wrong?