Are you thinking of hiring a nanny but are worried about not only FINDING the perfect nanny, but how to go about doing a background check, getting a driving record, and checking references?  Are you too overextended and overwhelmed to even begin the search and go through hundred of applicants, let alone conduct an interview? Are you unsure how a nanny can even benefit your family? As a busy mom and entrepreneur herself, Liz Oldham opened Knock Knock Nanny to …