What would you do?

JR • Little man born 5/28/2015. 4 losses (8/2016, 11/2018, 3/2019, 6/2019). Little lady born 4/18/2020
I am 11 weeks (12 weeks on Monday). I am a teacher and want to announce my pregnancy to my students on Halloween (with a cute tshirt). My doctor says everything is fine and progressing very well but something inside me is very traditional and wants to wait. Like I said- everything is fine. Am I being crazy wanting to wait 3 days?