How did you tell your family?!

Hi this is my 1st baby! I am currently 4wks 4days. I was wondering when did you guys tell you immediate family?! I am 22 and nervous to tell my parents especially. I just want them to be excited and happy like i am! When my brother told them about my nephew they were upset and said he ruined his life....Now they love my 2 year old nephew and we all can't imagine life without him! i just need advice on when to say it and what to say. I know my fiance's family will b supportive i just want my family's support too.