My sister molested me as a child?

I'm a girl

I'm 18

Sister is 7years older than me

This type of abuse happened probably 10-11years ago.

Initially it started when I was a child, I never knew what sex, abuse or intercourse was. I was just an vulnerable, naive little infant who followed the older siblings because "supposedly" they knew what was right and wrong. To begin, I remember me and my sister use to take baths with eachother - I don't know if that's weird, or if people do that now. But in the 90's it was common. Or probably it's common within my culture. Anyways I remember my sister use to try rub her ***** on to mine and I didn't like it! Also when we was alone in the room she use to make me dry hump her. So she would rub her vag on mine whilst wearing clothes. Being young and naive I thought it was normal. I use to enjoy the feeling and did get sexually aroused. The reason why I'm bringing this up now is because I think this traumatic event lead to me having multiple personalities, being depressed and suicidal. I think this is the cause because I've got this resentment towards my sister. I try to act nice and pleasant but deep down I feel physically sick because it's all forced. Me and my sister argue a lot we throw horrible retorts at each other, so I retaliate by calling her a rapist and a molester and she hates it, because she knows it's the truth. Because when I call her other things she doesn't retaliate as bad. But this is effecting me I want to tell my family but I'm afraid of what will happen