My best Friend is Pregnant

My husband and I have been trying to have a baby for the past four years, it's been very difficult for both of us, we cry and imagine our life with a baby of ours and wonder why not us? 
My best frien Nicolle call me this morning to tell me that she is pregnant, she haven't told her boyfriend yet, they do not live together so she call me very scare and ask for advise, she did told me that it took her a while to decide to tell  me because she knows my struggles on getting pregnant. I told her that I love her and she can count on me for anything. But still... I feel very angry, not at her, to God maybe...
I am very happy and scare for her but I am jealous, and I Can't never tell her this. I can only endure and support her and do no make it about me, because this is her time, ...but I'm still angry. Her tommy is gonna grow and she gonna have that glow that every woman have when they are pregnant. She is gonna become a mother, a little person is growing inside her, one day soon this baby will call her "mommy" and she did not even plan it, she is not even married. 
... This is not easy for me, 😢