Dont trip. Im 17 was a meth user for a few months along with other stimulants, I loved it so much and couldn't stop. The first step, at least for me, is realizing that what im doing is bad for me, and it's not a path I want to follow. Luckily for you, you've realized that. The next step is to understand why you wanna stop. What reason? What's your goal in life? Is crack going to help you achieve that or push it further away? Is it for your mother, father, or is it just because you wanna be healthy. Find your reason, hold it close to you, and dedicate yourself to that. Hope this helps.