How long did you wait to tell?

Milly • Mama of two, Alice born Oct 2017, Bear born Sept 2020.
My doctors appointment is today! I've had 10+ positive pregnancy tests and I'm currently 3 weeks and 5 days. I'm going to the doctors today to gets bloods done to make sure I'm healthy and of course to verify that I am in fact pregnant! 
My question to you though, is how long after you were positive you were pregnant, did you wait to tell people?
I've heard 3 months, 6 weeks and straight away. 
I told my immediate family (mother, father, mother in law, etc) once I got the 10th positive test, but I asked them to keep it to themselves till after my doctors appointment. 
What did you ladies do?