So I told a few of my work colleagues I'm pregnant this week and now it seems to of all turned in to a joke! We have a group chat in work and I'm very close to an older guy who is married with children, we're JUST friends! I love my boyfriend to pieces so I'd never ever cheat and I've looked at the group chat and this has now been said about MY unborn baby and that it is my work mates child! Baring in mind I asked these colleagues to NOT say anything because I haven't told many people yet.
What would you do in this situation and what can I do?