Advice please

Even though I was only raised by a few of my older sisters, I have always been a responsible mature person who knows that the way to a healthy life is a healthy body brain and heart that live in harmony and peace together. Im 16 year old girl yet unlike most teens around me I have never snuck out ,skipped school ,got in any trouble , drank alcohol or smoke etc etc before
But today...I snuck out and was too close to buying a pack of cigarettes but I stopped myself last moment and returned home.
I’m afraid next time i won’t stop myself
Not just that, lately I have been wanting to try a lot of new things..
What should I do?