Can nub skull and ramzi theory be wrong?

Jessica • I have a little girl in heaven and 2 little girl's and a little boy on earth with me a wonderful husband of 10 years

I want a boy but when I posted my sonogram most people thought it was a girl this is my fourth baby I have 2 girls and a boy and this pregnancy is almost more like the pregnancy I had with my son my baby bump moves from low to mid and I haven't thrown up any I've had some nausea but no where as bad as I was with my girls I feel like I'm pregnant with a boy but people guessed a girl I'm confused