Boy or girl

Hi! I had an ultrasound at 14 weeks and 5 days. They thought it was a boy, but I can go back in 3 weeks for a free follow-up scan. Could she still be unsure and could it still be a girl? Maybe the labia look thick now? I see something sticking out, but it doesn't really look like a scrotum with a penis to me. Would love to hear your thoughts.