rape dream coping?¿

when i was really young, like kindergarten young, i use to have bad dreams about being raped. i can tell you where i was in the dream, the man who came out of my closet, the barking dogs in the background, and the sick feeling when my mom was on the other side of a glass window and couldn't hear me screaming. i was too young to know what rape was and my mom didn't let me watch inappropriate movies. i am now 15 years old and still have trouble coping with it. when i was 14 my brother tried (he used his hand to "guide me" i nvr just took control) (my youngest brother was in room so i didn't make a big scene) to finger me and get me to jack him off. idk why but i wasn't scared and i hardly think about it. and i use to have a babysitter (female) and she wanted to play bf/gf and she kissed me but that's all i remember. i need tips on how to cope with all of this. i mean it sucks having a good day then that just pops in your head randomly and ruins it. i don't wnat to continue this throughout life and it's hard for me to really have a relationship with guys.