It's not weird, I feel like that too! At the moment my big thing is Facebook pregnancy announcements. I love Facebook and go on there about 5 times a day... lately it seems whenever I log on, another of my friends has posted their happy news and scan picture! Although I am so happy for them, every time I see another one a part of me just goes 'arrrrggghhhh another one! I'm so jealous! I wish everyone would just stop getting pregnant until we are ready to join them!' lol.
I agree with everdreaming too - I think sometimes it's people that you don't expect in real life, so it comes as a bit of a shock, whereas at least we are all in the same boat on a forum like this!