Congratulations...I went through a similar situation last year...I was only 16 weeks though. I personally waited until 14 weeks this time to let the cat out of the bag to everyone. Except for close family and friends I needed for support. It was so hard though. It is really up to you. But I didn't want to go through having to tell people it didn't work out again if I lost it. So I would wait at least a few

more weeks. Good Luck and I wish you the best.