How far along am I?

Kimmie
It pisses me off that I truly don't know how far along I am! They gave me a due date of May 28th for my first ultrasound but always say it could be a different day and they've always said "around" that day each time since. When I went in for my scan the other day (November 18th) the bottom of the ultrasound says 12 weeks 6 days under where it list the CRL. Does that mean that's how far I was on that day? My LMP was 8/22/15 and my cycles are 25 to 27 days long. Anybody with some insight on this? Here was my ultrasound on Weds...