Memories of molestation. TRIGGER WARNING

I don't know if this is logical or not. I don't know if it even happened. I'm 18 now but when I was around 14 I had sudden suppressed memories return to me. Or maybe they were always there. I don't know. I was around 4 or 5, possibly 6 and my sister molested me. Exposed me. Encouraged me to do things. The memories are so vivid, it feels impossible for them to be fake. My sister is 22 and she acts she never did those 'things' to me. What she taught me. She's a saint, a missionary. Pure and innocent. But I remember. The sounds, the touch, the images. I remember a lot. But she doesn't remember. She's innocent. I feel like I'm the only one who remembers. Is it even possible? Am I crazy? Imagining things? What is real? Was IT real? Why am I the only one that remembers? Why am I the only one depressed with self-inflicted scars? Bipolar. Tainted. Voiceless. Who would ever believe? I am not a saint, unlike she.

So, how is it possible? How?

Maybe it never happened. I am just crazy.