Preemie not growing

Brianna

Does anyone feel like their preemie does not grow? My daughter was 4lb 15oz(drop to 4lb by day 4) and 16 3/4 in at 36 weeks. She is now 17months and is only 17lb (<1%) and 28in(<1%) and her head is also <1%. She is in size 2 diapers, 6 to 9 month clothes, and size 2 infant shoes.

Dr is not worry but i am. She was not Grown in height or weight in 2 months. She also is not walking and has leg braces! Should I not worry about it?