my little one is almost 15 months old....she learned to hold her head at 6 months...she sat at 8 months..she started crawling at 11 months..n started to pull herself at stand at 13 months..now she is walking and standing with support very nicely..but still she is not able to get back to sitting position from standing position and also not standing and walking independently...doctor said she is fine but it's just she is late at achieving physical milestones..but I m worried and wanted to have second opinion...is her growth pace normal...plss experties and experienced mom reply