When did you have your first Ultrasound!?

Katy • Son born 4/18/15; 2nd baby due 10/25/16
Hi All, I'm a little over 4 weeks I think and will be going to the doctor next month to discuss having the 8 week ultrasound. My cycles were really irregular after coming off Breastfeeding my first so I am guessing my due date is about Oct 27th. Anyways I never had an early ultrasound with my first just the 20 week anatomy scan. 
So when did you have your ultrasound or are scheduled for one? Could they see anything?