When should I tell my family?

Cynthia
I'm almost 6 weeks along. I've told my 2 best friends and my boyfriend. I'm not really trying to tell my family just yet because they'll freak out lol and not in a good way even though I'm 27. I figured I'd tell them at christmas. I'd put an ultra sound picture in a card and give it to them lol I should be around 16 weeks by Christmas. I'm super nervous though