NIPT sex results incorrect?

Here’s the thing. I had my NIPT done on January 19th, results were supposed to be back in 5 days. I was 11 weeks 1 day pregnant.

We had a delay in results. They weren’t able to get any results from my first vial of blood, so then tested the 2nd vial.

Results for the sex finally came in yesterday (I talked the receptionist into telling me), but have not had a call from my doctor for the genetic testing results.

Is there a possibility that the sex could be incorrect? Seeing as how they had troubles with my samples. I was so so so sure we were having something else, so now am in a bit of disbelief.

Thanks!