Active baby/straight umbilical cord

Samantha
I had my 20 week ultrasound the other day and my baby was so active. The ultrasound tech as getting annoyed because she could not get great views because the baby's face was posterior and his back was facing the front of me. Afterword, my doctor said everything looked good but that the baby was moving a lot and not positioned in a way that was easy to see so they might need to rescan me. She also said that the umbilical cord looked pretty straight and that it it could impact the baby's growth. I got a call that they are going to send me to a high risk OB for a level II scan because their equipment is better but I'm really nervous! I cannot find a whole lot of information on a straight umbilical cord but the things I do read freak me out (of course). Has anyone had a similar experience?