Being referred out to a Perinatologist for Level 2 Ultrasound...

So I went a few days ago (3/30/2016) to my OBs and got an anatomy ultrasound done. They measured baby and all that and also found out we are having a baby girl 👶🏼🎀 !! So here comes my concern... I got a call yesterday from my OB saying I was being referred to the perinatologist to have another scan done to get better pics of baby girl . She was moving A LOT and we didn't get good pics of her.. I just want to know if this is normal or should I worry? I'm a first time mom so idk how this works lol.