Ahab, hang in there. The shakes are definitely scary. I know for me it's helpful when I go through withdrawal to make sure I am eating regular, healthy meals. Lean protein and lots of fruits and veggies. Helps me with the shakes, though I've not ever had that for more than a day.
Keep checking in here. I'm totally rooting for you!!! I do know from my many getting sober experiences that the sleeplessness does go away. Instead of tossing and turning, I get up and read for a while til I am sleepy again. I had wicked insomnia myself last night, complete with waking up sweating after scary dreams. I feel your pain.