Has anyone gone to rehab? Is it helpful or is it more about yourself just developing will power?

Ive been pimo for 4 years, married, no kids lucrative job that gives me way too much freedom.

Since waking up at 20 I've developed some addictive problems. Started with going to the casino just on weekends, then drinking heavily every weekend, now at least five drinks a day. Then I started hanging out with some old friends who had gotten disfellowshipped and left. At the time they were into cocaine, and I tried it a few times, which turned into every weekend for a year and has turned into nearly every day for nearly this last year. I'm now 20k in debt, which honestly wouldn't be a huge deal, I could have it paid off in 3 months but I buy too much cocaine. I constantly say I need to stop, every time I can't sleep till dawn, or I wake up feeling like complete shit or feel those chest pains, but next day I always seem to be back on the coke. I just can't seem to shake these nihilistic feelings which leads to my constant attitude of fuck it, or I use the fact that I have to go to a meeting as an excuse to drink and do coke. I don't really want to go to rehab as it would certainly out me, lead to my disfellowshipping and probably ruin my relationship with my wife and certainly would ruin it with my parents and other family. But on the other hand I don't want to die.

I'm just wondering if rehab is a very helpful option like worth it and necessary, Or if it's more about my ability to develop will power and stop being such an idiot.