It can be a sign of anemia or just needing more fluids or maybe just a pregnancy craving. If you get crushed ice or like formed crushed ice like at sonic it will minimize or end any tooth damage. You should ask your Dr what your iron level is and increase your fluids. Then just enjoy your ice, I love my ice and I crave mine because I don't drink enough fluids.
Eating ice is a sign of anemia , that's how I was I would also cry sand like clay things and I was put on iron supplements cause my iron levels were low.
Eating ice destroys the enamel on ur teeth, the stuff that keeps ur teeth from being insanely sensitive I have a horrible habit of eating ice but I hear its becuz ur body needs more iron so try taking some supplements for iron instead!