Clear up a Bad Reputation?

Okay so no judging. What do I do when I’ve created a bad reputation for myself, I realize its my own fault I know this. But I wanna change and I want it all to go away. Just forget the rep I have and get to know me for who I really am. Has any bad reputations happened to any of you’s, that was your fault or not that you beat and/or overcame. It would probably help if I meantioned the rep I’ve given myself, and im not proud of it either. I’ve kinda got the slut reputation.. but those who know about stuff only know 2 sexual incidence that I have had, yet I’m still labelled the slut. What would you guys do in my shoes? Has this exact rep happened to you?