I'm worried because a filling in one of my teeth has fallen out. I became aware of it while sipping something cold and felt sensitivity. When I looked in the mirror, I noticed a filling had fallen out. I'm concerned because I've heard that pregnancy can be harmful to your teeth and gums. Has this happened to anyone else? Is this an emergency, or can I put it off until I see my dentist? Please help me! I'm 7 weeks pregnant.