There are lots of threads on this topic already. I suggest you using the search box. That's a pretty large daily dose so chances are it will not be pleasant until you get your refill. I hate to suggest a benzo, because it can often lead to switching one addiction for another or possibly adding a new one. But, with that said from my experience withdrawing from my prescription of oxycodone by xanax script is the biggest life saver.
I suggest you take a benzo of some sort to help with RLS, anxiety and some other symptoms.
I also suggest you not using them for more than a week to reduce the chance of a habit. I usually wait until my symptoms are too much to handle then take a 2mg xanax. Loperamide (imodium) is a good tool as well during withdrawals. If you take a look around the forum, you will see a lot of threads on imodium helping people through withdrawals.
Remember to stay hydrated and try eating. In a bit when you start to feel a bit better make sure to exercise. I'm sure other members will chime in soon.
good luck