I'm 8 weeks now but my 3 year old told everyone when I was about 5 weeks

We purposefully didn't tell him because we knew he would but he must have heard us talking.
I didn't mind him telling his grandparents because we'd want the support if anything goes wrong but he's told his nursery teachers and all of his friends
I have to tell work asap because of what I do my role has to change slightly and I need time off for appointments. I've only told my manager and the health and safety person though. I think