First of all, congratulations!
Secondly, I wholeheartedly agree with you. After going through a lot of heartbreak to get pregnant with Natalie, I have learned first-hand never to pester anyone about being pregnant or TTC. I remember one time in particular at my cousin's baby shower that my aunt was giving me a hard time. She said something like, "Oh, "TexasSmith" must be so freaked out by all this baby stuff!," implying that it was all scary to me. She had no idea that we'd be trying to get pregnant for over a year, and she also had no idea how much that comment hurt. Of course, I don't hold it against her...she just never went through IF, so it never occured to her that that could be a hurtful comment.
All that to say, I will never again be that person who pesters a friend about babies. You just never know who is going through what.