Could 3 lines at 15 weeks still be a boy later on?

Ashley • FTM 👩‍👧‍👦 babygirl 4/20/19

So I had an emergency ultrasound earlier this week at 15 weeks because my bf accidentally kicked me in the stomach flailing around while sleeping. Everything is fine, the dr said she takes that precaution with any trauma to the stomach.

I didn’t get any u/s print outs, but I asked the tech to see if she can tell the gender. She said it was really hard to tell but maybe it was a boy. Then my dr looked at it and said if she had a gun to her head she would say girl. In one shot I swore I saw the 3 lines. Could the 3 lines be there now and it’s really a boy? Has that happened to anyone in a previous pregnancy??? My 20w Anatomy scan isn’t until December 7.