I sent the wrong message. What should I do?

Hehe, why bother about a wrong message? No matter how much you regret now, it's impossible to get it back. You might as well let go.

Originally, it was just an unintentional move, but the time and process were too coincidental and easily misunderstood. Things in the world are often so helpless that you don't need to mind too much. In fact, the average person will feel relieved when he receives your short message. You can send him that kind of short message if you want him to do something, so don't mind, but if the teacher is narrow-minded, it doesn't rule out the possibility that he has ideas in his heart. If you really care about this matter, you might as well find a reasonable excuse, meet him again, and then find a chance to tell the whole process of this short message as a joke, so as to avoid your embarrassment and get rid of the bad feelings in the other person's heart inadvertently. I think you will understand why.