Possible twins?

Yesterday I had my ultrasound and they said the baby is on the left side. When I did my first ultrasound to see if I ovulated I had 1 on the right side at 13mm follicle. The left side had 2 follicles which were 19mm and 14mm. Is there a possibility im having twins or no? I'm only 7 weeks and the girl at the ultrasound said the baby likes to hide and she can't tell if there's more than one or not.