How do I tell my parents that I'm pregnant?

Someone please help, I'm so nervous.. I took two pregnancy tests and they both came out positive. So my boyfriend and I decided to go to the doctors to make sure.. and sure enough, my test came out positive. I'm 6 weeks pregnant and due in September. HOW DO I TELL MY FAMILY? I'm 18 and my boyfriend is 19. We plan on getting an apartment together within the next couple of months. We have been dating for a year, he swears he's going to be there for me and I believe him 100%. He's already told his family and they're very supportive. My mom got pregnant with me at 18 and had me at 19, so I guess she went through the same thing but my family is VERY judgmental and would probably make me feel like crap. What do I do.. :( 😪