Anatomy Scan Scare!

Hello ladies!! 20w 2d with my first baby and it's a boy!! Very excited to be welcoming him into the world in 20 weeks! However while at our scan 2 weeks ago my midwife told me that I had marginal cord attachment to the Placenta meaning it attaches to the side of the placenta instead of in the center. Have any of you experienced this news? I am so worried now that something is going to happen to him! I also haven't been feeling a lot of movement like some of you have. It's still fluttery and I don't get to feel it everyday. Anyone in this boat!? Midwife did say he looked healthy and was measuring right on track! Hoping all is okay with this sweet guy!