Blood tests determined my child was a different ethnicity: Thoughts?

So I had blood work done to determine the gender of our child. Well my question is, does anyone know how accurate this is from experience? My results are saying girl but with a Y chromosome, and then they did an ethnicity test, and it says our child is mostly Asian and Mexican, which my husband and I are not (husband is African-American and Caucasian, and I’m just Caucasian). And no, I didn’t cheat on my husband, I’m a SAHM who doesn’t go anywhere, and he works from home. I already messaged my doctor about my results, and all they said is it’s just worded confusingly.