Where did i actually go wrong?

I hate to admit this, but i was a total rebel in the past. I couldn't care less about my studies, about the school rules and constantly went out till very late. However, there was this sudden switch in my head that turned me around, i won't say 360 degrees but maybe like a 200 degrees? I mean, i still love going out very much, i love the night and i still do stay out sometimes but really rarely and only if i can. Currently, i love studying, i love the feeling of accomplishment after i finish an assignment, i obey the school rules now, i've changed a lot.
Recently, I've been going out a lot more often and my parents are telling me I'm not working hard enough because my exams are around the corner. They've been trying to force tuition teachers on me, in hopes they'll force me to be more hardworking. But i really hate being forced to do things, the more someone forces me, the more i don't do it.
Of course I know that my exams are coming soon, of course i know i should be working hard. But in their eyes, I feel that they still of me as this irresponsible child that can't be independent.
I'm sure i'm not the only one who faces this kind of fustration. But a wise person told me, "If you, yourself knows you're working hard, don't let people assume and talk shit about you like they know everything." And I'm living by that. At the end of the day, its us who are taking our exams, not our parents or our teachers. If we choose to believe in ourselves then who else have the right to tell us otherwise. Show them, show your parents, show your teachers. Get that A1, shove it in their faces and shout "Bitch!". Okay, maybe don't do that, you'll probably get slapped real hard. But prove it to them that you are actually capable.
Know yourself, know your plans, know your heart. Everyone has their own style and passion. Follow them. Dream big, go big. Likewise, I shall do the same.