Is it too early to tell family about pregnancy?

Kay
I will be 4 weeks tomorrow. Due date ~ March 21, 2016. We got married  a month and a half ago and stopped "not trying to get pregnant"  after my last period. We are very excited it happened so quickly, but I am worried it is too early to tell anyone. 
I found out yesterday and plan on making a doctor appointment ASAP. 
Thoughts/advice?