Good mate lost baby :(

My good friend has a little boy and has been trying to have another one for 8 years, she fell pregnant 4months ago but lost baby at 6 weeks,I'm now 13weeks and been holding off telling her as don't want to hurt her feelings but going to tell everyone at 20 weeks and feel as she a good friend I need to tell her soon, but don't want her to be upset 😢
I just don't no what to do :/