Help!!

I’m posting this because I need help.But I’ve been through some pretty traumatic stuff... from seeing someone left for dead in a hospital, seeing dead bodies of close family members and stuff and also some childhood trauma... I am still a minor so I live with my mother and I’m her only child so I feel like it’s my responsibility to take care of her so I never feel confortable talking about my emotions. I know I can trust her but I don’t want her to feel as if she’s failed as a parent, so how could I tell her I feel like I need therapy and I don’t wanna self diagnose but could also possibly have anxiety. Also!! I feel comfortable talking to others more than family