Broken Teeth @ 32 Weeks Pregnant, Worried About A Tooth Problem?

Okay, I had two cavities prior to becoming pregnant, I never had the time to deal with them, scheduled to have them removed, this appointment turned out to be three weeks after I found out I was pregnant. Well, because of the whole calcium/bad teeth thing during my pregnancy, one of those teeth cracked about two weeks ago when I was chewing a piece of plastic. (There's no toothache pain) Chewing on plastic is a habit I've developed with this pregnancy. Anyways, now one of the teeth is completely gone, except the bud I'm sure. It doesn't hurt, but I'm wondering how damaging that could be to me? I won't be able to have any dental work done for some time yet. It doesn't hurt, it's just was brittle, and now it's gone.