Sneak peak test possibly contaminated?

So I’m pregnant with my second child, and I got the sneak peak at home gender test and it came back that I am pregnant with my second boy! My first son is 18 months 😊

Although I am so happy To be having a boy and really only care if the baby is healthy, I was wondering if there is anyway it could have gotten contaminated? Or of anyone else has had that happen? I did try and be as sterile as possible and didn’t have my son around.

I was hoping for a girl this round 😂 maybe it’s just crazy thinking but I can’t stop thinking that it could be wrong. Either way all we want is a healthy happy baby!