OP
I bow to Tarka's superior professional knowledge. I should also point out that I am a man, although not a particularly big one - about 10 stone over 6 ft at the end of my drinking.
Nevertheless, I drank double or more what you drink, for longer than 2 years, and gave up suddenly (I did drink again, but not because I planned to) with no side effects that required medical attention.
Symptoms you should expect are sleeplessness; heavy strong-smelling sweats; loss of appetite; dry skin and/or spots; "washing machine head," an inability to switch off the flow of thoughts; listnessless; increased use of other mood-altering drugs which you may happen to use (especially nicotine and caffeine) and the short-term side-effects arising from that; a feeling of "fragility"; generally being out of sorts. You may also get mild tremors. This stage typically lasts for a few days and then starts to get noticably better.
Heavier, more sustained drinkers sometimes get delirium tremens (shakes with hallucinations); serious mental and nervous problems; and fits.
I would also fully agree with Tarka that, if you are at all worried about this, do involve your GP and do follow his or her advice. This is especially true if you attend AA meetings. Some well-meaning alcoholics (who forget they speak only for themselves, not for AA) will tell you not to use drugs, even on prescription. In fact, this is a massive and potentially fatal distortion of AA's message which is that you should have no fear of using drugs if they are taken for a real purpose and in accordance with your physician's instructions (ie not self-prescribed or gained decitfully).
Hope some of this helps, happy to chat further.