Friends pregnancy

My partner and I are trying for a baby and we made the mistake of telling our best friend we are trying, now she has a tendency to have to have the attention she wants and has just came to me telling me she is pregnant, knowing we are struggling. 
How should I react because in honesty I'm livid with her I don't want to look at her I feel as though it's all to take attention and be center of it I'm so angry everything I do she is there doing it too My partner and I can't do anything without her having to one up us. 
Am I over reacting?