Originally Posted by
GettinSober 
Before I came to this site I would have said that given the amount you drink and for the relatively short period of time that you would be very, very, very, very unlucky to suffer from more than sleeplessness.
I heartily agree with this, and would like to share my experience with tapering off/cutting down. I can't tell you how many times I tried, and it worked for brief periods, but those in AA can tell you that alcohol is "cunning, baffling, and powerful". In short time I'd be drinking full speed ahead, and I usually returned with a vengeance, drinking more than I had before I tried to taper off.
I'm very familiar with anxiety attacks as I suffered from them in my first couple months sober. If I could make a suggestion it would be to see a doctor/physician and see what they recommend for you. Sleep will return, but first you need to detox. Please proceed carefully and with caution.