I can't offer advice re: having a similar experience.
Just know that they can often get very caught up on percentiles and if you looked at a chart, it may only be the difference of mm's or a cm, differentiating you or your baby between different percentile groups. Both my sons were born huge and dropped down the percentile chart, from high 90% to the 10-25th%. The mchn usually freaked out about this, but they were fine. A lovely paed once said that some babies have a catch down, if they are born big and full of fluid etc. So, I'm just saying, that 24% doesn't sound bad - some babies have to be smaller, b/c that's what they're basing their percentiles/averages on. A friend had her firstborn on the 3rd % and her paed said 'well, somebody has to be on that percentile and he was feeding and sleeping well etc. I'd say if your obs isn't concerned, then it should be fine. Hope the rest of your pregnancy is healthy and that you and bubs get to full term in no time!