Nipt test says girl 20 week ultrasound says boy

My

I’m so confused right now I did the NIPT Test at 11 weeks results said girl but today I went for my ultrasound UT said I’m having a boy 🤦🏽‍♀️ plus right after I left my scan I got a call from radiology to reschedule another ultrasound in a week. Has anyone ever experience this and if yeah which one was actually accurate?