Announcement!

So I'm 8 weeks and 1 day today.. I have my first appointment in 2 days. This is my First pregnancy and my close family and best friend already know but my boyfriend is so set on posting it and announcing it to the world the day of my appointment.. I had said I wanted to wait the 12 weeks before posting it for everyone to see but he always brings up how it's his baby too, and thinks I'm not happy because I don't want to announce it yet. How early is too early to post it? Or how early did you guys post it for people to see? I'm just worried something might go wrong and everyone will already know and it'll be hard