Proof of pregnancy appointment question

I wanted to make a prenatal appointment when I first found out I was pregnant but they told me I’d have to get a proof of pregnancy appointment first.. they said this would tell me how far along I am so I’m assuming they would do an ultrasound then right? According to my lmp I’d be about 7 weeks at the appointment (8/3).. hoping they do because I want to find out asap how my baby is doing 😭