Pro DJ with Cocaine Addiction Concerned about Triggers

In some ways your situation is similar to anesthesiologists whose work exposes them to drugs that are passively absorbed.  Like DJs they have a very high incidence for drug addiction compared to other people.  Even after an addicted anesthesiologist receives treatment, they can’t return to their previous occupation, even though they can remain in the medical field as another kind of physician. It may be too much to hope that with treatment you can return to being a DJ.  Even if you were to try, any success would depend on a sustained period away from the dance floor first.  How long is hard to say but probably at least a year.  You may want to think of your career more broadly as involving music, and look for a path that may give you more control over your work environment.