Why Not ME?

Let me start by saying that I am happy for my friends who are pregnant...but why not ME? I just found out that one of my previous co-workers is due in Aug. and last time I spoke to her she wasn't even trying. Like I said, I am so happy and excited for her, but it's so frustrating knowing that we've been trying for almost a year! Another girl I went to grad school with got engaged, married, AND pregnant all in the time we've been trying. I mean, really?! It's a very difficult feeling to deal with and I hate having to not be able to join them with a big belly. Today's one of those not so good ones...