by KATE MULVEY, Daily Mail 08:54am 24th February 2006 As I lay on the bathroom floor, clutching my stomach, the tears rolling down my cheeks like torrents, all I could feel was a gaping, infinite sense of loss. Yet I was not at some funeral of a loved one, I was at a child's fourth birthday party, and I was the only woman there without a baby. Are you childless and is it right for you? Tell us in our reader comments below I never planned on being 39 and childless but somehow, here I was, a few months shy...