Got some bad news for you, bucko. At some point you're gonna have to be sick. You can do it now or once you get to jail.
Kicking is a bitch but you can do it. Try to find some NA meetings to attend. Many people just like you found their answers and strength there.
I have never met anyone who has done a "taper off" for more than 2-3 days that has actually stopped using. Possibly people do, but I haven't met any and I've met thousands of addicts that are clean for long periods of time.
On the bright side, like it or lump it, you've got a pretty good chance to detox. Yeah there's dope inside, but for most folks it's a little harder to get a habit inside. Once you are in DON'T USE, once you get out DON'T USE and there's really really strong odds you'll never have to go back.