Nail biters: Ever had cracks in your front teeth?

So, I’m a pretty terrible nail biter, and today I noticed some very faint cracks in my front teeth (only visible up close in a mirror in daylight). Of course, I Googled it, and apparently nail biting (and tooth grinding, and natural strain) can cause small tooth enamel cracks called “craze lines”, and they are generally not an issue unless the breakage goes beyond the enamel.

Have you ever had this happen to your teeth because of nail biting? Did it ever get so bad that it required dental work?

I know I need to stop.