How do I tell my parents I'm pregnant

Chelsea • 19 . Mommy to my sweet baby boy ❤️ 10-25-16💙🍂🍁🎃
So I'm 17 I turn 18 in July. I just found out yesterday morning that I'm pregnant. I'm not close to either of my parents and everything I do is wrong to them. I feel like They will try to attack my boyfriend honestly. They wanted too when they found out we was having sex, they always said if I was pregnant he would leave in a heartbeat but honestly he is so excited scared but excited. I'm not sure what to do .