I had no idea you were 13, your very wise for your age.

Anyway, yes, it's normal to be a little scared, especially with what happened to your Grandma (sorry), but please do not get to scared and freaked out till you get your x rays. It may just be a false alarm and the doctors may just be extra cautious since it is heredity and you had a family member experience this.

I'm going to keep you in my thoughts. Please keep us posted and let us know what the Doc says okay.