Hows it going for you today? Feeling any better? I'm on day two for the third time in a week, so you're not alone man. It's not an easy thing to face, physically or mentally, but then again, I had no illusions that it would be. As they say, things could always be worse, and I know that's not what anyone wants to hear, but know that people coming off long acting opiates like suboxone, methodone or seeds/pods (not sure on this one, actually) are enduring 40+ days of acute WD. And millions of people have come off those drugs. I found a book by an author named Stanton Peele called "7 tools to beat addiction" (something like that, you'll find the title if you search the author). Definitely not for everyone, but for those that don't relate to 12 steps or the disease model of addiction, may find it of value. Just my $.02 - sometimes all that is needed is a shift in thinking, not at all unlike the experience you've had with the 'fake' pills. Hang on to that, as it may just be your saving grace.
About your preferred ROA, I worry about your sinuses. It hurts to think of the sheer quantity of powder you were putting through your nose on a daily basis for a relatively extended period of time. Count yourself lucky that you still have a nose. Seriously. Meditate on that for a bit and add it to your arsenal.
What another poster on this thread mentioned about confronting the negative emotions instead of running from them can be the difference between relapsing and getting sober. IME, there is usually something underlying the addiction, some compulsion. We aren't stupid people. Most of us are just trying to feel 'OK'. Something that is more painful to face than the addiction itself, which is why anyone would continue self destructive habits like railing vicodins despite the obvious risks. You'e But, I have found, that if you just sit with whatever is underneath the addiction, it can finally be seen for what it is. Don't run from it, and it will cease to chase you. You sound like an old school guy. Face it, resist the temptation to turn away from whatever you see when you peer into what is behind the addiction, which may just be a symptom of the larger problem.
Last bit of advice from someone that has endured acute WD more times than I can count: the mental chatter / fear of the unknown (which are really just two sides of the same coin) can be the most difficult obstacles to overcome for a lot of us. The less expectations you have going into each day and the more you are able to stay in the present throughout this thing, the better your chances. And you may just find that this is a skill that is transferrable to other areas of your life, such as work or relationships or anything really. Touch, feel, smell, listen, taste what is happening right now! I have actually found that even difficult things such as WD can be an opportunity to learn how to separate what is actually happening vs. the story (or the small embellishments we all make on reality) and begin to see as it is, instead of trying to get it to conform to your idea of what it should be like. Drop that fight, and you'll be surprised how much energy you have to tackle the other shit in your life.
Good luck man. There are many people on here with excellent advice that have been where you are. Learn from our mistakes, get clean, and don't look back. You got this.