please help

hi. i found out when i was 14 that what happened to me wasn’t okay. i have no idea how to deal with the fact that apparently im a victim of cocsa, so that’s why im here because i have no idea what to do. it started when i was 5, and she was 9. the first time, she asked what kind of princess underwear i was wearing, then asked to see. i showed her and she touched me, then asked if i liked it. i didnt know what i was supposed to like. this went on for some time, and eventually she got my sisters in on it too, they were her age. i didn’t know what it even was but i wanted her to keep hanging out with me alongside them so i didn’t complain. and the sister i shared a room with one night asked if we could “practice” so we could be good for her, then asked me to touch her. she called it her dog house, and i had to help the dog. me and my sister haven’t spoken about that night since it happened, and i cant get it out of my mind. but the girl never stopped with me, one day she came to my house and wanted to sleep over. i was so excited that she asked to sleep in my room with just me, and it got to bedtime, and she asked if i could help her, but i said i didn’t want to so she made me hold her phone that had porn on it, i sat there for however long while she did it, making me watch. i never knew it was wrong or anything, i just loved the idea of her thinking of me. the last time, i was 12. my family took her on our vacation, and she wanted to go back to the condo for whatever, she asked me to come back with her. i was downstairs eating pizza rolls, and she asked me to come upstairs. i walk in the room and her bottoms are off. she asked me to come and sit, and asked if i would help her. i said i didn’t want to, and she just asked me to take my top off and watch. i remember i just sat there staring at myself in the mirror. the whole time. for the first time, i was scared. we then left once she was done, and said nothing. when it was my 14th birthday, i talked abt it, and i was told that it wasn’t okay. 7 years of my life. i didn’t know. and i don’t know how to deal with any of this. any tips or help would be great.