Dear OP, do not start worrying, for goodness sake. Your child is 14 months. So what if no words are coming out yet.
I always recall these wise words once said to me:
we do desparately want our kids to talk, and then once they do, we are always telling them to keep quiet, or trying to get a word in ourselves (My 9 year old doesn't shut up!)
We are desparate for them to walk, and then spend the rest of our lives telling them to slow down, be careful.
Another tip is to aks yourself how often does she hear you say 'mama'. Do you refer to yourself as mama? When my first born was little, my husband was concerned she never said dada, but when my husband spoke to her, he would say, come to me, not come to dada. Once he changed his way of communicating my daughter started calling him dada. Easy.