Would you believe the ultrasound and Dr?

Im 17+3. Today I went for my ob visit. She did a handheld ultrasound to check on baby. We were able to see between the legs. Dr. Said looks like a girl, I also think it looks like a girl. There was absolutely no sign of boy in between those legs lol. How accurate do you think the handheld ultrasound would be? Should I go along and believe its a girl? You could see how its completely fkat in between the legs. No penis sticking out lol. I have 2 other girls and their ultrasounds looked like this. But i dont know if I should believe it because it was a handheld ultrasound