14 & preggo

Ik this isn’t anything about tmi but this is the only group that will respond to my stuff. But I’m 14 y/o and pregnant. My and my boyfriend always use protection but I get it things can go wrong . That’s not the point tho .... how can I tell my dad ? I live with him ( no mom ) and I have no idea how to tell him . I dont want him to be mad at me . ! Any help ?