Frustrated

So I’m needing some advice. I had an ultrasound Saturday and the tech couldn’t get the gender because my little one wasn’t positioned well. So today I went back to get a confirmation and a different tech (who was very rude from beginning to end) told me that the cord was in the way but she wrote down her thought on what the gender was for my sister in law to do a gender reveal for us Friday. Idk if I should be concerned about her “guess” or not. She was not confident at all which makes me extremely nervous 😩