my manager at work knows I'm pregnant and I asked her not to tell anyone or say anything until I at…

my manager at work knows I'm pregnant and I asked her not to tell anyone or say anything until I at least hit my 12 week mark. she slipped up and told one person I work with and run duty with a few weeks ago and he said he would tell anyone. well much to my surprise I get into work tonight and they are having a meeting which I couldn't attend because of my children and they all turn around and say congratulations on your pregnancy. let's just say I'm a little peeved off right now because it was non of their damn business to go around telling everyone I work with that I'm pregnant.