Did mine at 29weeks, they turned out perfect. She looked like a wittle real human lol not alien like.
28 weeks is the best week.
I would wait until almost the end of your pregnancy so the face is developed
Where I had my ultrasound done they did it between 28&34 weeks and results are so much better
I'm 20 weeks, and had an awesome 3d scan :/ I'm sorry yours didn't go well!! But, we want to do another one when we get farther along also, just because it was really cool (: I think we're aiming for 30 week mark.
I did mine around 30-32 weeks with both of my kids and they turned out better than the ones I did earlier in the pregnancies. They start to get chunky around that time and it really shows you what they will look like. I compared my kids to their ultrasounds and they look almost exactly the same.