Needing advice

I am currently 13 weeks pregnant. I recently did the chromosomal test to test for down syndrome and such. Well everything came out negative which is good. However i found out that im having a little girl which yay so happy. Would have been either way but my best friend is taking it hard. She lost a daughter at 24 weeks in her pregnancy and has 3 little boys running around. Shes shutting me out and im terrified i am going to lose her as a friend and idk how to approach the conversation or how to get her to talk to me about it or even see me. How long should i give her before i try to talk to her in person?