17 & pregnant by boyfriend I’m not supposed to be w

So yesterday I found out I am 4 weeks pregnant. I am only 17 & have been with my boyfriend for 2 1/2 years but my parents have told me to stop seeing him a little over a year ago bc I was caught sneaking him in/ sneaking out w him.. my mother knows we have had sex before but my father does not even allow us to hug for more than about 3 seconds & recently started letting me see him (behind my mothers back) & only w my fathers supervision. I don’t have anyone to go to for advice on telling my parents the news & need help. I’m very nervous for their reaction & they are both Hispanic & very strict so the fact they don’t even know I’ve been seeing him & now I’m also pregnant by him is going to be a mess telling them. How should I tell them, what should I say, & how should I prepare for it?