Since u had that miscarriage u should be considered high risk and have an ultrasound at least every 2 weeks. I had a LEEP done on my cervix and was considered high risk and had them til i was 24 wks so u should definitely ask ur doctor and they should give u one.
They should do a scan for you just make sure to schedule an ob appt, try not to worry or stress over it you blessing puts stress on baby too so just relax and remind yourself to think positive. One miscarriage doesn't mean you'll have another.
You could go to a free clinic that does ultrasounds. I did that with my last 2.
When you have your first appointment they should give you an ultrasound to check how far along you are