I absolutely hate the judgement around telling too early. There is such stigma around pregnancy loss. She's obviously aware of that potential for loss but is sharing her whole journey and this pregnancy is part of her journey now, no matter what. My first pregnancy ended in the stillbirth of my son at 41+5. Obviously loss is much less likely at that stage but there's no such thing as a safe time. I ended up needing IVF for my second son and shared immediately because I wanted to embrace and celebrate every moment, and also because I knew I'd want people to know and support if something did go wrong. It's up to each person to tell when it feels right for them, whether that's immediately, at 12 weeks, 20 weeks or with the baby in their arms. It's about time we stop shaming each other for these ridiculous 'rules' which only reinforce the shame and stigma.
Also, having done IVF, the two week wait is a killer. Most people.test early. The 'i just wait for my period' screams of the privilege of not having had to walk that road.