I had my first ultrasound today.

Yay me! However, according to baby's size I'm not as far along as I thought I was. If I count based on my last period it would be 9 weeks and 1 day, but baby's size says 6 weeks and 5 days. I'm really quite shocked, 3 weeks is a big difference. Anyone else get this type of surprising news?
Re: How many weeks?
frequent lurker.
married: 08-09-2013
baby boy: 06-16-2016 at 34 wks.
TTC #2 March 2017 (initially med free)
BFP #4 8/14/17 *natural cycle* EDD= 4/25/18, MC @5-6w D&C 9/22/17
BFP #5 12/29/17 w/ Femara/Ovidrel/Progesterone/Synthroid, EDD= 9/11/18 found out 1/18 ITS di/di TWINS!!!
DS and DD born 8/21/18
MC @ 5w 03/16
ALEXANDER JAMES DUE JULY 15th!