Pre e is very frequently a disease of first time moms and you never have it again. I also had it with dd (was induced at 37weeks) and so I understand your concerns. However, I don't see that it would do any good to hide it from your OB. They don't want to deliver you anytime soon and wouldn't push for that unless things got dangerous for you or baby. But pre e can lead to eclampsia which is very very serious. Why risk that? Tell your OB. Hugs mama.
Wife to the love of my life, mama to 2 beautiful blessings from God