Can girl parts be swollen at 32 weeks?

We don’t know the gender of our baby but had a scan at 32 weeks today and they said to look away when they looked between the legs so we did. Then when I looked back I saw a picture they had taken to the left of the screen and am sure I saw something sticking out however just a little nub type thing, no scrotum. I automatically thought oooh it’s a boy (have a girl already so would be so happy with this) but I don’t want to get it in my head it’s a boy if it could be swollen girl parts at this stage? Thanks xx