How do I access my private browsing history?
Here is a quote from a Wikipedia:

Privacy mode


  Privacy mode or "private browsing" or "incognito mode" is a privacy feature in some web browsers to disable browsing history and
  the web cache. This allows a person to browse the Web without storing
  local data that could be retrieved at a later date. Privacy mode will
  also disable the storage of data in cookies and Flash cookies. This
  privacy protection is only on the local computing device as it is
  still possible to identify frequented websites by associating the IP
  address at the web server.


You may try to find logs from any routing, filtering or tracking hardware or software inside your network, or from your Internet provider.