When do you get your first ultrasound ladies?

Help!!! New mom alert

***So I took a pee test at home confirmed I was pregnant then I went to my normal Doctor Who did bloodwork and said I was pregnant but did not do the blood work where they determine how far along you are. Then I called my OB/GYN and made an appointment and they told me that I don’t need to come in until my eighth week for an ultrasound and I’m kind of confused don’t they want to make sure the baby is in the right spot? Should I push for them to do an ultrasound sooner?