See a medical professional immediately; it is recommended that you go to the ER.

I feel for these people tremeandously and I want to help at this critical time. This shocked me when I realized that people were already finding my website althoug it's only been up a few weeks. I had to do something right away to help. I added this article, as well as on the homepage the bold writing about the symptoms and to get to a doctor.

What to do if you're shaking (withdrawing from alcohol over use):
see a doctor right away.

Why are you shaking? DTs. Here is an excellent article about the difference between DTs, Delirius Tremens and "simple" alcohol withdrawal. Basically, you can have "simple" withdrawal hours after you've gone out drinking, or if you've cut back recently. That type of withdrawal is like having the flu, where your temperature rizes, your heart beat elevates, you sweat a lot, and probably vomit.

DTs, "delirium tremens" if fatal. The person is confused and disoriented, aside from being physically sick. They are delirius. Because of how serious alcohol withdrawal can be, you should always get medical help. You can go to the ER (hospital emergency room). The person needs to be evaluated and detoxified. In detox they will give you medication to reduce the risk of having a withdrawal seizure by providing calming prescription medication (benzodiazepenes).