Should I tell her?

I am a mother of two and 9 weeks pregnant with out third! Had our first ultrasound and everything looks great. Going to be telling friends and family likely this weekend....but I am very nervous for one person in particular. My best friend recently shared, after keeping it a secret from almost everyone, that she has had two miscarriages this year. My heart is breaking for her and her husband. The last thing I want to do is hurt her by sharing our good news. I also dont want to not tell her and have her find out on social media or from a mutual friend or something like that. What should I do?