i think i broke my heart today

so a few weeks ago we found out that i was going to be an aunt, and the entire family was super happy but not allowed to tell anyone just in case. but mom didn't remember that and she told like half the family. well today we got a call saying that they lost the baby. and when i found out my heart just sank. i have has a horrible pain in my chest since, and it wont go away. i cant even talk to them because what do you say to someone who just lost their first baby? its just heart breaking. they were so excited and were still to scared to tell anyone.