Anyone else's baby teeth early? Marley's 9 weeks old and we've been up with her for about 5 hours…

Anyone else's baby teeth early? Marley's 9 weeks old and we've been up with her for about 5 hours now. I didn't think anything of it until now and I stuck my finger in her mouth and ran it all over her gums. And sure enough there a tooth coming it! I thought my grandma was crazy when she said my mom got her first tooth at 3 months old