I made this mistake in home ec class in junior high!Boys does it hurt and its a shocker! But I have always been extra careful after that. I can't remember how long it took to heal. The needle was stuck in my finger and the teacher had to come over and hand turn the wheel to get it out of there. Not a good day in class. But that was EONS ago...lol
But I can still remember it.
The good news is, it does heal.