I got my first trimester screening, with an ultrasound and blood work. I am 13 weeks and 2 days. This is my 4th pregnancy so I've done ultrasound before. when I got the ultrasound it was very fast like maybe 15 to 20 minutes they usually last little longer she did mention that the baby was very very active. when the doctor spoke he said it everything looks good but still waiting for my results of blood work. should i be concern about very fast ultrasound. Its never been this fast before.?