I have a baby girl who turned 8 months a week ago. She does not roll over, sit up by herself, stand up straight (she has noodle legs), does not grab things or does not focus on anyone or anything except me and her dad which we still have to do a lot to get her to focus. She does not eat her baby food that well, it always seems like her tongue gets in the way. I am worried because she isn't in the place where most 8 month Olds should be. Should I be concerned?