Girls, how many teeth do you have at the bottom of your children's mouths?

Girls, how many teeth do you have at the bottom of your children's mouths? We have 5 on top and still 2 at the bottom. She hasn't been able to sleep normally for two days, her hands are in her mouth, she cries in the evenings. What's most important is that her jaw sometimes holds it crookedly grinding her teeth (I don't know how to explain). I don't know what to do, how to stop this habit from her.