Bad habits gone worse?

Hi. Over the course of about a month, perhaps a bit more, my habit biting the sides of nail beds has gotten completely out of control. I guess it was only when I was bored, but it is now literally all the time. After I got a manicure, and they trimmed them down, it was a little bit better. Now it's ridiculous to the point that I tried putting medical tape around my fingers. Obviously that was a failure because it was inconvenient, time consuming to wrap them and just strange looking. Usually my thumbs are the worst, along with pinkies, to the point of making them bleed. However, I do it with all ten fingers. Please help! Thanks in advance!