8 weeks & 5 days pregnant

just got back from the midwife.

had the first ultrasound and the baby is growing well. but what is the bulge at the top of my uterus? I have to see the gynacologist for a check-up in 2 weeks.

What could it be??? I’m worried. The midwife said it doesn’t harm the baby and that it is just a check to see what it is.