I think everybody reacts differently. I read one person who was here who had been taking it for 3 months and had no w/d whereas mine has been rather protracted. But I took it for a long time and a lot of it.
For 7 days I wouldn't expect much w/d but it sounds like you are having the same rxn I did: anxiety and heart palpitations, etc. My guess is at worse you'd have insomnia for a few days. I understand the lying down thing, for me it was extreme restlessness when I'd lie down that would feel sort of stomachache-y. I would have to kick my feet to expend the energy.
Hang in there, I can tell you from experience, get off now while it's easier. I kept putting it off and getting readdicted and this was probably the hardest week of my life.
Another thing, even at the doses I was taking, a lot of docs think the w/d is only a few days, but it's more like benzo w/d (also I was sprinkling in a bunch of ativan) than they realize. Is it possible though that you were having a lot of anxiety to begin with? Or are you w/d from something else as well?