Had to have a growth scan yesterday and my baby was 4lb14oz at 34+5 weeks, they said that put her in…

Had to have a growth scan yesterday and my baby was 4lb14oz at 34+5 weeks, they said that put her in the 16th percentile (two weeks ago at her scan she was 4lb4oz and in the 30th) doctor said she should've grew 16 oz instead of 10oz and they are checking her again in two weeks and said if she drops below 10 percentile that we will "discuss our options" what does this mean?? I was to in shock to ask good questions! Said baby's breathing, her heart, and everything looked great she was just petite but this was a concern bc I'm 5'8 and husband is 6'. I'm terrified!