Can Blood test be wrong

Charmaine • Miami Girl Living In A Charlotte World!
I'm currently 16 weeks pregnant and found out I'm having a boy through blood work two weeks ago. I know they say blood test is 99% accurate but anybody else out there won't be 100% satisfied until you see it via Ultrasound??? Unfortunately my next ultrasound is not until my 20week scan so I'm looking at another month. I refuse to buy any boy things until I see the penis on the big screen 😫😩😂😂