Wrong SneakPeek or Peekaboo boy result?

An

I did both tests. I’m supposed to get my SneakPeek result back today. Peekaboo came back as boy but when I was collecting the blood, I was having a hard time and it got up under my finger nail. I live with my husband and two boys so I’m thinking it could have been contaminated. Did anyone get a wrong boy result?