I am in the same situation as you.
I am now pregnant after D&C, afraid to share the news with my parents
especially inlaws. Afraid they will be disappointed again if anything bad
happen. The earliest time I will tell them will be after I see the sac and
healthy heart beat of baby. If possible, it will be more safe after the
first trimester screen, which is around 10-12 weeks I think, will see.
My mom actually asked me the same question like oh did your period went back
to normal after D&C. Since it never came after D&C for me, I just go like "
it will be alright, not this fast, stop asking." lol