Announcement anxiety - any tips?

So I’m a pretty private person and decided to tell about my pregnancy only a few people, my closest family members and my boss (I’m obligated to tell my boss and HR). My boss announced my pregnancy to other colleagues when I was on vacation a week after he found out and people keep telling other people about it. I get anxiety because of it, maybe because I had an early miscarriage before this pregnancy, i don’t know...

Any tips on dealing with this anxiety? I’m super pissed that people keep telling others about it and don’t even think to ask if it’s ok to share the news. I already told them to keep it to themselves but they keep spreading it 🙄😡