Feeling blue

Don't know what's wrong with me at the min. Constantly feeling really low + feel like I've have forgotten how to smile. Everything seems like it's rubbing my face in it, everywhere I look, every page I turn, there seems to be a new announcement, another birth, someone else sharing their happy news + it furiates me that something so wonderful can make me feel so bad. I wish I could stop feeling like this, I just don't know how + right now, it's tearing me apart :-(