Have you tried chamomile or mint tea before bed? I've found that sometimes after I've had a particularly stressful day at work (or drank a TON of caffeine throughout the day), a nice cup o' tea relaxes me and puts me out.
I know that your body is still going through the withdrawal process and that it's a different situation than my stressful days, but you might try it. Or, a nice hot bath before bed? Maybe with a little bit of lavender?
Just trying to help you out a tad... Sorry your day sucks, justme! But remember, when your day sucks, it will get better soon! :)