Why am i doing this to myself? Im destroying my life...?

Im a 16 yo girl and the last few months i have been so angry someone will do the smallest thing an ill snap my parents dont trust me anymore coz i started sneaking out an getting drunk an hooking up wif multiple guys in one night. I started smoking cigies an weed. I also recently got arrested an now hav a criminal record. Im not the sort of girl ud expect to be in these situations im young looking for my age coz of my small frame. I dont understand y im doing this to myself i dont know wats happening to me up until recently i was a model student an my rents trusted me. Wen i was in yr 5 an yr7 i was sexually assualted an never told anyone i thought iv dealt wif it fine until i pulled my friend out of a bathroom (before i started getting myself into trouble) after shed been raped i still feel guilty an it was about 2 months ago coz i was supposed to be looking after her at the party. I was attemped to be abducted a bit after christmas. I feel like i cant trust anyone anymore and everryone irratates me. Im scared all the time and paranoid, my parents tell me that i juz need a bloody good kick up the **** and dont understand. I cop alot of slack lately for being so syneical but i dotn know y i am wats happening to me? how can i stop myself beofre i destroy my life?