3-D ultrasound?

Brenda
First time mommy to be! I had a question I'm just about 26 weeks, and I want to know at about How many weeks do you mommys recommend to get a 3-D ultrasound??? I heard some weeks are way too early and some weeks are too late when babies moves down into pelvis.
Help! 
I also plan to ask my doctor at my next appointment but I'm just so anxious to know already, just to set up a 3-D ultrasound appointment.
Thankk Yoou!
Show me your 3-D baby's!😍
Update 
Here it is!! Lil Mama💕
28weeks