So my 21st birthday is next month & I know my family is going to want to take me out to have drinks…

So my 21st birthday is next month & I know my family is going to want to take me out to have drinks or whatever.. BUT I just found out I was pregnant (9weeks now) & I have yet to tell my family! Only people who know are my mom and siblings & my baby's father of course.

Help what should I do or say? I eventually have to spill the beans & I'm nervous because it's so soon after my 1st born .