Can you take a sick day when the thing that is wrong is that you are emotionally disabled today? When the problem is that you just want to go home, crawl back into bed, and cry your face off? Because you know that would be the best way to deal with this huge lump of emotion that you are carrying around.
But, since that is just not an option, and because you know darn well that "heartbroken" really isn't a valid reason to leave work, you push it all down inside to that chamber of hurt. Instead of dealing with it right now, you will have to deal with it another time, in another place.
Putting off the pain is a healthy way to deal, isn't it? No? Well, I guess no one told The World. Because that is what you are expected to do.
P.S. There are too many pregnant women coming to playgroup all of a sudden.