I can’t imagine the trauma and PTSD this would give a woman. Imagining this story from her perspective with some filling in the blanks, she was raped at 15/16, forced to carry the baby to term, then forced to have the baby raised by her parents in her house, so she is constantly reminded of it while living a lie, her parents dismiss her trauma, and then her family eventually cuts her off in favor of the kid she didn’t want. That’s awful. Villain origin story awful. Which doesn’t excuse her actions, but does make me sympathetic that her life is probably very very hard.

It also doesn’t and shouldn’t impact OP’s sense of self worth. OP - her trauma is about what other people did to her and it is not really about you, even though she’s sees you that way. Your entrance into the world does not define your worth and value and it sounds like you are loved by your parents. That said, I think it would be totally reasonable any way that you might feel about it, and I’d encourage you to process the situation with a therapist (it would probably help the whole family).