next appointment - no ultrasound??

Hello ladies! this might be a stupid question but i’m genuinely confused.

I have my next appointment this Wednesday at 12 weeks + 3 days. I noticed they did not schedule me for an ultrasound this time (we had one at our 8 week appointment).

If we don’t have an ultrasound done, how will we know that everything is ok and the baby has continued growing since the last appointment?? I’m anxious to be through with this first trimester and want the knowledge that all is still ok!

Thanks in advance and apologies if this is a silly question :)