sensitive topic, trigger warning

I’m not really sure where to put this question so I’ve decided here is fine. I am 16 years old and 7 weeks pregnant. I really don’t want any lectures because believe me I’ve spent the last 3 weeks crying and telling myself i’ve ruined everything. I haven’t told my parents because I want to tell my sister first. She’ll help me and tell me how to tell them and what to do. The problem is, about a month ago, she was raped. She is very sensitive to emotional topics and cannot watch movies that are too intense or triggering emotionally. I really want to tell her so that she can guide me but I do not want to hurt her even more than she’s already been hurt. Should I skip her and tell my parents or will she be okay? I know this seems like a stupid question. I just don’t want to hurt my sister but I need help. Advice?