Is it worth it?

Alli • 22 single Mom of Grace 10-8-18 ❤️❤️

So my doctor said they won’t do the anatomical ultrasound until 21 weeks. However I’m trying to decide if it’s worth it to pay $50 and get one done in the next week or so to find out the gender. I didn’t know I’d have to wait until 21 weeks for the doctor to do one :/ so, do you ladies think it’s worth it or just wait? (I’m 15 weeks now)