Am I the worst daughter ever?
Yes, you are.

And so am I...
I put off telling my folks until about 12 weeks, because they are never happy for us anyway. It's a drag telling my family b/c I know I'm going to get "the lecture" about my age (geez, I'm only 33), my health, we should get "fixed", blah, blah... And then they get hurt that I don't want to tell them.

Oh, and I didn't tell my boss until I heard the rumor was out in the neighborhood (we live in a very small town) and I was afraid she'd find out from somebody else... That was only about 3 weeks ago.
Well, I hope your parents are happy for you, and don't feel bad for not telling them right away... it is your news to share when and how you want to share it!