I told my mum around 5 weeks.. she said things like "really?" but i could tell she was kinda shocked a little behind that "really?". Because of that I held off telling my dad until after our scan at 5 weeks and 4 days (being my dad i was a little worried what he would say) as up until then we were still unsure what we were going to do as this baby wasnt planned. But when i told him he was the most supportive of anyone i have told. Hes a big believer that everything happens for a reason and believed in us that we could do this.. which was really nice.
Mum told my sister around then too and she was extatic. DH told his parents also and they were also really excitied.

I think at first if family arent expecting it, it is a massive shock and they dont know how to get their head around it all. As time goes on you will see that everyone will be just as, if not more excited than you are. As long as you are happy, thats all that really matters