Sneak Peak Gender Test Wrong??

Katey

My husband and I did a sneak peak at home blood test when I was 12 weeks and it came back as boy. We had some gender disappointment but really got around to excitement about a boy. Then this week at my 20 week ultra sound they said baby was a girl! The tech is having us come back in a few weeks because she’s never had this happen.

Anyone else had this happen? Do we start to shop/register girl?