Elective Ultrasound

So I decided on a whim yesterday to go get an elective 3D/4D ultrasound at 26 weeks at a place that many of my friends rant and rave about... My last OB ultrasound was at  20 weeks and the next will be 30 and the hubby and I just wanted to see baby. Well now I'm feeling really guilty about it because I know they aren't recommended and I'm worried that my decision was ill advised and that I shouldn't have put the baby in harm because I was being selfish and wanted to see him. Has anyone else done an elective scan? Has anyone's doctors said it was dangerous? Ugh I wish I wouldn't have gone now :(