One or two babies?

Just out of curiosity...I had an emergency ultrasound at 7 weeks due to abdominal pain. My hospitals rules are you don’t get to see the baby or any images when it’s an emergency ultrasound and the tech couldn’t share any news with me. The next day my doctor did call me to tell me everything looked good - his words were “you have a healthy pregnancy in uterine”. I’m assuming that means one baby right ? He would have told me at that point if it were twins? I don’t have another ultrasound until I’m 12 weeks and I don’t have my first prenatal appt until 14 weeks so I’m just curious to know !