What do you do when everyone you know is pregnant?

I found out today that 2 of my friends are both pregnant with their third babies. It hurts more than anyone will ever understand. I feel like it's never going to happen for us. I'm so tired of waiting and hoping. I don't even want to be around them anymore and I know I'm not going to want to go to their baby showers or to the hospital to see their babies. It's not that I'm not happy for them.. I'm just really sad for me. I broke down at work when I heard the news. I'd give ANYTHING to be pregnant.