Hi there and good job on the tapering. It's tough for alot of people, which is why so many quit cold turkey.
You wrote that today is your last day - You could just get the tapering overwith and start your withdrawal now and flush that last vicodin. It doesn't sound like it's helping much any longer since you're already going through withdrawals. And the sooner you start, the sooner you'll finish.
Just a thought.
You're doing all of the right things to help you physically; the mental part is so much harder as you already know. My best advice to you is to just give it time - it's really the only thing that will get you back to your old self again. In the meantime, check out the health pages for foods that naturally increase dopamine levels - here is the link:
http://www.medhelp.org/health_pages/Addiction/Foods-that-Increase-Dopamine-Naturally/show/594?cid=66
Also, exercise is one of the best ways to burn out that anxiety get those endorphins going again.
I know how miserable this is for you, but you have to go through it to get back to your old self again. Just stay busy and keep your mind occupied as much as possible. You might want to try benedryl at night for help with sleep.
Keep posting so we know how you're doing. You can DO this!
Sandy ♦