2 vessel cord

We had our scan yesterday and found out baby has a 2 vessel cord as opposed to a 3 vessel. Any other mamas experience this ? My midwife seemed calm about it but I'm a little freaked out. We couldn't get a good read on the heart because baby decided to either be full blown wiggling and the. Ready for a nap. I have to go back in a few weeks for another scan to check the heart, and the. Again at 32 for a growth scan .