Just had my anatomy scan

Sariah • 26, married, nurse, pregnant with my rainbow baby and first child.
Found out our little one is a girl! This little girl of mine was measuring in the 20th percentile, a little bit small. On my previous ultrasounds she was right on track. It had me a bit worried, but my midwife tells me that they will just check her again in a couple months to see where she is at then take it from there. Has anyone here had a small measuring baby at about 19 weeks, and had everything turn out ok?