all I can add is be brutally honest with your doctor so that they can know the whole story... i had my 2nd child past 35 and with my family history of risk factors that i was direct about, i had lots of screenings etc... obviously you can't change anything prior to today but you can do a lot differently going forward...
congrats on the pregnancy... sorry you are so alarmed... maybe find a meeting to go to and take this as a HP message?