PD: June 23, 2017
RFE: January 30, 2018
RFE received in uscis: February 8, 2018
Petition approved: Feb 15, 2018
NVC received my approved petition: Feb 24
Right now, I'm waiting for NVC to email me the welcome letter so that I can continue to the next steps.
I called them and they told me that I need to give them couple of weeks more because they received a lot of cases this month.
I am in the waiting zone right now.