I literally cannot stop doing drug

No matter what it is i cant control it and cant stop it for any longer than 24 hours. Pcp, opiates, benzos, coke molly. Even fucking weed i cant control. Im a superdrugaddict. I go to rehab for the first time thursday after being turned away 3 days ago at an inpatient facility and im terrified im gonna kill myself (unintentionally by overdose) before thursday even comes around. I just got out the psych ward last week. I was in the hospital for heroin overdoses or psychotic PCP episodes 7+ times over the last 6 months not counting the 4 times i refused further medical treatment. The police took me every time. I overdosed the day after i got turned away on a whim. I smoked pcp tonight. I left my IOP (1st day) to get klonopin. I cant fucking stop. Idk the point of this post. I just wish i didnt have this addiction gene.