Workplace depression

I'm currently ttc. My husband and I have been for one year. I am the active duty member. I had this "friend" at work, that I confided in her, with all of my infertility struggles. She proceeded to tell me "I'm too young to have kids (shes 2 weeks older than me), and I signed a contract to the military and I need to honor that". That's fine it's their opinion, whatever. However a month later the told me that she was pregnant. Ever since she found out, she has been flaunting it around me and all she wants to talk about is her baby. I have told her how it makes me feel, however she refuses to change.

Please give me some advice on how to continue through this struggle. Because, now, all I feel like doing while at work is crying