Need Help With A Teeth Issue...?

Last year, I had a serious eating disorder with which I would self-induce vomiting. I've since been treated and warned of the damage it causes and have ceased it. However, my teeth have shrunken significantly because of it. Is there any way I can rebuild my teeth? I don't know if I'm ready to face my dentist with drastically different teeth than I had the last time I saw him.