My baby’s umbilical cord isn’t connected to the center of the placenta it’s off to the side has any one had this and had a healthy baby

I’m horrified right now I went for my anatomy ultrasound and they told me that the baby looked fine he’s growing on track but that his umbilical cord is not attached at the center of the placenta it’s a little bit off to the side I was so upset and so scared I didn’t think to ask any questions about it until after I left. I have since called to ask a few questions and I’m waiting for them to call me back but for now I need some positive feedback. Has anybody had this happen to their baby and had a healthy baby? My biggest concern is does this mean his oxygen supply is limited and could affect his brain