Help announcing to family?

So I just recently found out I'm pregnant. And I'm excited. Ive been with my boyfriend for about eight months now but have been talking/hanging out for six months before we became official. I knew from the start he was somebody I wanted a future with. Now this pregnancy wasn't "planned" so it was a surprise but a pleasant one. Anyway my family is super judgemental like they want me to be done with school and married with a house before I start having children so I'm really nervous to tell them because I'm only 21 and not married and not finished with school. I'm terrified to tell them but I know we want to keep the baby. Any advice on telling them?