Babies on the brain!

I work on labor and delivery and love it! Well atleast I have up until my hubby and I started trying... Now it's babies everywhere that seem to be going home to unstable families.. Even some moms that are drug addicted having their 4th baby.  I am active, non-smoking/drinking, and have a very healthy marriage so I am having an extra hard time dealing with disappointment every month.. It seems like it's never going to happen.  Any tips on staying positive, especially for when I'm at work?