Annoying unsolicited comments

Is it possible to not have the typical physical pregnancy symptoms like darkening of some areas in the body or the pregnancy nose? Some people are doubting that I will have a boy when it’s clear on the ultrasound just because I don’t have the typical physical signs. I already had two ultrasounds and the second one clearly revealed our 2nd born will be a boy. I currently don’t have any breakouts or whatever. It’s a bit annoying like why would they wish that on someone who is pregnant.