to announce or not announce

Danielle
Hi there! I'm due dec 15th 13 weeks 2 days now.. I got my 11 week u/s and everything looked great! We were going to announce between 12-13 weeks on SM but I chickened out 😩 I just feel like I don't have a current u/s ya know? Anything can happen..
I mean I still feel pregnant for sure but a part of me wants to play it safe and just wait for my 15 week u/s...lol  anyone else feel this way or am I just being silly? Also did anyone announce without a current u/s?