Possibly a wrong or scammed number.

Pennsylvania came up in the ID - apparently there is a Fertility, PA near Strasburg Pike in PA.
I don't know any Keara Williams either.  Apparently there are several folks with the same name as well.
Didn't leave a message. So I'm guessing a spoof here.

717-305 (Fertility, PA) - PhonenumberStar.com
www.phonenumberstar.com/717-305
717-305-8974 : Keara Williams