Don't worry. I delivered a healthy and happy little boy when I was 35 year old, and now at 37 is bearing a second child. For this pregnancy I will go for 抽羊水 for safe of mind. Other than that everything okay so far, no vomit and no morning sickness (touch wood), just like the first pregnancy.
I disagree with what you doc said.... "BB的質數(跟父母的年齡相關), 都大不如那些後生的夫婦". Just make sure you eat healthy and exercise during pregnancy.