Born in Egypt to American parents?

I was born in Cairo in 1962. My parents are both Americans but I was raised with my dad's family who is mixed Egyptian. My mom left Egypt and planned to return but my family moved in the meantime and she couldn't find us because they didn't want my mom in our family because she's not Muslim (my uncle, who is now dead, told me this so that I wouldn't think my mother had abandoned me). So I grew up mostly with my grandfather and extended family. I never attended school. I was married to a Muslim man at 13. It was very abusive and his daughter (not mine) helped me leave him in my twenties and I came to the USA, technically illegally. I have no records about my family or myself. I have tried to contact my family for information but they are ashamed that I am no longer Muslim and have left my husband so they refuse to help me. Their phone numbers and such have been changed. I have no idea where to find them. I have tried to contact many of my old friends but my family has alienated them for the most part as well. They won't speak to me. I've been living in America for over 20 years "under the radar" for the most part. I'm just so afraid to do anything to ask for help that they'll deport me. I know my parents are Americans but I don't have anything on them information wise. They weren't married (that's another reason why my family didn't like my mom). Without legal doents, I can't go to school or get a decent job (little under the table jobs is what I mostly do). I've been learning to read and write (I've been illiterate for most of my life) and I want to do something like go to school and enjoy life as I haven't been able to so far. Can America deport me if I step forward? Technically, being born to American parents would give me citizenship, right? I have tried to contact my husband's daughter for any information but her father has now forbade her to speak to me and knowing my husband, I would not want to put her in physical danger. What can I do? I really honestly do not want to go back to Egypt.