When is it safe to tell family the news??๐Ÿ’œ๐Ÿ’œ

Ash โ€ข Married 8.2.2014. 1st Boy 11.24.16. 2nd Boy 8.27.18
I've heard 3 months. But I'm only 5 weeks I think. I just found out I'm pregnant this morning! Still doesn't seem real. So idk how long I can keep a secret! Our parents have been bugging us and disappointed when we weren't pregnant. How long should I wait to tell them??