17 Pregnat Petrified of parents? Used to being the 'good girl'? scared being kicked out?

Ok so I am usually (besides one rebellious event in my life years ago) known as the good girl. My parents are really strict my dad esp is EXTREAMLY harsh. My family are Christians, including me even though I have done terrible things and I am a terrible role modle.but I am not here to talk about that, thats another issue entirely, I am really good in school never been in trouble and I get great grades and im the first college bound person in my entire family. Well my bf of two years and I may be expecting a baby...its not for sure just yet...and though I want this possible baby despite the hardships..im scared to death. I love my mother more than anyone and this will break her heart, my dad will probably never speak to me again ( i mean seriously he almost kicked me out over not picking up a small piece of trash i honestly didnt see) and the rest of my family holds me on such a high pedestal! Has anyone else been in this situation? How did you handle it????