I've been wrongly accused of child abuse or neglect (not sure which one)...?

These false accusations were made against me and my husband. We came home today to find a letter on our door from CPS. I am beyond upset and wanted to know if anyone has had this experience and I would like to know what to expect at the first meeting appointment with the case worker and also since they have left the letter at my door have my kids been interviewed already? I am upset *crying* right now because I know these allegations are incorrect and I want to clear my name and prosecute the person whom made these false reports. Is it possible to be able to find out whom made the false report? Thank you for your help.