Got my tooth crowned, and my voice is so much higher?

Today, I got my tooth crowned, and I've always had a deeper voice. I sing in choir, and I always sing with the bes/tenors. Thus, I am the only contralto. But my voice is much higher now. I don't get it. It was such a small chip, and I want to stay a contralto. Is there anything I can do to get my range lower again? My low notes come out higher. (Same jaw position and stuff, but it's just confusing me and making me mad.)