Baby #2 Announcement Ideas

So me and my SO have had a lot of sex since my period has ended. Glow says I’m due to ovulate in 2 days(we had sex Sunday) and glow isn’t always right. I doubt I’m going to find out I’m pregnant since my periods are always wonky because of my pcos but if I do, how would you go about announcing it to everyone and your SO? We aren’t trying for a baby but barely doing anything to prevent(we wouldn’t mind another baby either). I would love to keep it off social media but I definitely would love to shock him and try to capture his reaction. What would you do?? I do have a “Ice Ice” *arrow pointing down at belly* shirt for possibly a pregnancy announcement in the winter time with an ultrasound or a baby due in the winter time but idk if I should use it.