Announcing pregnancy

Okay ladies!! I'm currently 8 weeks pregnant and the only person who knows about my pregnancy is of course my wonderful boyfriend and one of my closer coworkers!! I'm having a hard time keeping this secret!! I'm not super close with my family so I'm not ready to tell them quite yet. But it'll have to come out here in a few weeks after my dads insurance gets billed for my first ultrasounds and blood work and  all that stuff. But I just need some tips on how to keep it in a while longer! We didn't want to announce for quite a while longer, and I just want to announce it to everyone! Lol