Hi everyone, just thought I'd share a tip I just learnt. I've told some family (but only a few friends) now, and one of the family that found out today wrote on my facebook wall "congratulations on your pregnancy". Note, I haven't posted this there - I've kept facebook deliberately clear of any mention of it.
Not particularly welcome as I'd like to tell people myself and in my own time - there are some good friends I'm seeing soon and I want to tell them face to face. Also not to mention that there are work colleagues who I'm friends with on facebook who don't know yet.
Anyway, I managed to delete that post within 3 minutes of it being posted and then found out that you can change your settings so that people can't write on your wall. They can respond to your posts but not write on your wall so it makes the congratulations message much less likely.
If anyone else thinks they might have similar issues, go to account settings > privacy > customise and it's in there.