Doctors appointments- how often ?

Tanya

Ill start off with saying im 12 weeks pregnant (due March 31) went in for an initial doctors appointment to confirm pregnancy and do a complete blood work. I booked an ultrasound on September 6th and the tech said everything looked good. It's now September 18th. Shouldn't the doctor have contacted me ? Do I call them ? How often do you go in for appointments ? (I've had 2 failed pregnancies prior - 1 ectopic , 1 early miscarriage) I dont want to look like I'm crazy calling them and not knowing what to say haha