Unknown Mold..?

Sometimes it feels as if there is this invisible mold that I was placed into from birth. As I grow, I learn more and more about this mold like the procrastination and [tendency] to disobey my parents. It's like my way of going through the world has already been predetermined and even though there are moments when I want to break through, there are always questions and doubts following my "mold-breaking" actions so I eventually end up taking the easy road to avoid all that. For example, I get an assignment done extremely early, Everyone acts like it's a miracle or something and it just makes me feel awkward about doing the work earlier than normal. I hate that that's how I feel, but there has never been a time when I haven't. Along with that, let's say I decide to help with laundry one day without being asked.. I get attacked with questions like "What did you do that for? You want something, right?," "Are you the real Chelsey or some sort of fake?," or "How much did you pay your sisters to give you the credit?" It's so frustrating to me. Why can't I just do something out of the ordinary just to do something..?! Does everything I do to break this set mold have to be unreal or a one time thing? Why can't I change my mold? I want to change. I hate this mold I've been put in. I don't want to be this person anymore..! How do I change?!