Only DH and a couple of friends from my August bus know.
I'll probably tell close family and friends after the scan results and let it trickle out that way. Not planning any social media announcements.
DD1 is 20 and when I was pregnant with her you only got a 20wk scan. So you got to 12wks and told people and kind of hoped all was ok as you'd got that far.
Dd2 I told everyone after my 12wk and probably did a Facebook post.
Dd3 I told close friend and family but I was a bit embarrassed as the gap is small and I went back to work pregnant so I kept quiet until about 20wks.
DS I told close friend and family after my 8wk scan, and told people as and when I saw them or they noticed 
This time I feel a bit like I did with dd3. Small gap, #5, 41, I feel a bit self conscious again