Not sure when to spill the baby beans!

My 12 week mark is tomorrow and I've been itching to announce it to my friends and colleagues. However my next appointment won't be until I'm 14 weeks. I have had two normal scans and heard the heartbeat at 11 weeks. Do you think I'm in the clear to finally announce it or just wait until after my next appointment in two weeks? This will also be my rainbow baby. With my first pregnancy, I told everyone at 6 weeks and miscarried two weeks later. So that's what is drawing me back from telling right away. All responses and feedback are welcome! Thank you mommies.