Of course you did. That's what crackheads do. That's what heroin addicts do. That's what alcoholics do.
Nothing we all haven't heard before. Or done ourselves (or some variant with our DOCs).
12 Step is a really good start, NA/CA in particular. People there have been through what you will be going through. I've met a lot of crack smokers who got sober. The secretary of my home meeting was homeless on the beach with a crackpipe in his mouth. A cop walked up and said he'd shoot him if he lit it and took a hit.
He lit it and took a hit. Cop got called away on an emergency before anything could happen. Met a woman who took him to a meeting and after a few false starts, he got sober. 15 years ago.
It's doable. It won't be pretty or easy. But it's your choice. And you cannot do this alone.