27th percentile

So I went for my normal appointment today and my doctor measured my fundal height. She was very concerned as I’m not exactly growing how I should. She sends me over to ultrasound where I noticed my LO is starting to fall behind in growth. She has always been 2 weeks ahead and my doctor came in and said that she’s running out of room in my uterus and that she’s going to repeat the ultrasound at my next appointment. I was told that she’s in the 27th percentile and weighs 2ibs 6oz. Now I’m extremely worried. Has anyone experienced this and had a healthy baby? I’m 28 weeks by the way.