If your child seems to be complaining of an inner ear infection you should go and get it treated. It might seem like that kind of childhood complaint that they will simply get over, and maybe they will, but a young child in particular is in a lot of danger from that kind of infection. Lots of kids still lose their hearing permanently because they had a treatable condition that wasn't seen to.
They try to test babies for hearing conditions when they are young for a reason. If your infant isn't developing speech properly, or you have any reason to suspect there's something wrong with her hearing, take her to an expert right away. In most countries there is a service which can test your child's hearing for free, or for a very cheap price.