HELP! When to Announce to Family.

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If this is not correct place to post sorry and delete it or move it...

Hi ladies, we just found we're pregnant after trying for 2 years. We have our first ultrasound appointment July 9. We are going to be home for Fourth of July weekend. We live in Minneapolis and our families live the Fargo/Moorhead area. We are all getting together, my family his family to celebrate. What are you opinions on announcing? Is it still to early? I will be a little over 6 weeks. I really don't want anyone to say anything either outside the family.

Also, on the subject when did you guys announce to friends on social media, and when should I tell work?