Harmony test!?

Taylor
So I'm getting it done the 17th and results are supposed to come back a week later... Hopefully baby is perfectly healthy! But also I'm worried about the gender my MIL wants to plan a birthday/ gender reveal party for us on the 26th my birthday and I've heard that the test can be wrong do you think we should wait for the scan to tell us?... Also I'll be 14 weeks during the blood draw!