Ultrasounds question

April
Hey ladies. So. I tested the 25th, 3 positives. Clearblue said 2-3 weeks. And just my luck, my doctors office is closed until Tuesday cause of Easter.
When do you typically get your first ultrasound? Cause I have no idea how far along I am and I know if it's around 3/4 weeks, then there isn't quite much to see with an ultrasound yet?.
Had a somewhat of a period February 26-29 with spotting until the 2nd of March. And was very surprised to get a positive since we didn't really BD much this month. 
Suggestions/Advise welcomed!