My bottom front teeth are hitting the back of my top teeth and it's causing the way I bite to change. How will they fix this?

My orthodontist recently repositioned a bracket on my top tooth next to the front ones on the right side so the roots would straighten out. It came to my awareness that it is becoming very slightly loose. I don't want them to take the bracket off again because I feel like it will make my tooth more loose. I'm very scared and I don't know what to do. Can taking a bracket off make a tooth come out?