my daughter is 16.5 months old ...she is very active n happy child...she says lot of words...she is very playful n she eats everything cooked at home...her urine output potty everything is normal...she learnt to sit at 7 months..she learned crawling at 10.5 months...she learned to pull herself up n cruise at 13 months...but till now she is just standing and walking with support...not interested in walking n standing unassisted...I m worried on that part...is it normal?? or should I go to infant ortho???