It appears from your posting that your packet 3 review is completed by NVC and they are in the process of mailing the reviewed packet to the consulate. If above is true (you had mailed the packet 3 to nvc for review) then you can expect cp interview in about 2.5-3 months.
Disclaimer: I am not a lawyer. My replies are based on knowledge gained on immigration sites & my studies on US immigration. It is always good to consult an immigration attorney such as Rajiv Khanna. If you have specific questions for me, please PM me.