Pregnancy annoucement??

Natalie
When is the best time to tell family about the pregnancy news?? I'm right at five weeks and my family and I are celebrating my birthday next weekend, and I will then be 6 weeks. My first dr appointment is next week 2 days before the birthday celebration. Would that be too soon to tell them all? We live almost 2 hours away from all of them, and we both just started new jobs. We have no idea when the next time we would see them in person would be. I've read a lot of blogs and books online and they all say to either wait until after the first trimester or to do whatever you feel you want to do. This is our first pregnancy so neither one of us know what to do??? I wanted to ask some of you ladies on here for some advice! 
Please help!!!