late talker, ear troubles

Hello, I have an 18 month old, she so far says no words at all. Just a series of grunts and babbling. She has had a burst ear last summer when she contracted whooping cough, and had been saying mama and dada at that time but after the whooping cough ear infection she has not said it again. Was on antibiotics for the whooping cough, as she also got pneumonia at the same time. She was an early crawler, just before 6 months old, and walked at 11 months. All motor skills are on track, likes to colour, play with siblings, eats well. Babbles a lot and also grunts and points when she wants something. I tried calcrea carbonica, for a week, showed no difference, it worked very well for my 7 year old, in a week she was using far more words. Now have given 1 dose of calcerea phos. Perhaps she is fine, and I am worrying too much, but I am surprised that she doesn't talk at all.