Any body else with small babies?

Heather • Mommy of 💙💓💓💓💓👼👼
So my baby was born 6 pounds even. Came home weighing 5 pounds 10 ounces. We just had her 2 month well check today. She is 8 pounds 12 ounces ( 8th percentile) and 23 and a half inches ( 12th percentile.) Her doctor says she is small but growing great. But still I worry cause babies born after her ( due 1/7/17 born 12/27/16) are bigger much bigger than her. She still looks like she was born a week ago.. My two oldest kids have always been in at least the 40th percentile. So this is all so new too me.