I would also say, like the others, go through with the appointment but don't worry.
I very, very rarely talked when I was a baby and when I was little and my mother worried about me all the time (really I didn't talk that much until college, when I could finally sometimes get a word in edgewise!) I'm my mother would have been taking me to specialist if she could have. She always spoke to the doc about it and he always said "she's fine". And I was, but in comparison to her/her family/my siblings (always talking every minute while awake) I looked very wrong!! But really, I remember, sometimes really wanting to say something but my older sister always talked for me. I just was too slow getting my mouth opened and getting those words out. Much slower at learning to read as well...Maybe your child is a naturally "kinesthetic" learner, since she uses her hands so well with her signs...or maybe she does have hearing/auditory issues. Go to the appointment LOL!
