Well you haven't been drinking that long, but you're drinking a fare amount. It definitely sounds like physical withdrawal....and if you're like me its very psychological as well. But its the physical stuff that can be dangerous.
There's a solution. Talk to your dr. Tell the truth and that you're trying to quit (I think that's what you're trying to do). You can get help with a medical detox.
Then ya gotta figure out how to deal with your life sober. The stress etc. There's lots of good advice here.