Hi Hobbit,
I drank like you. Straight vodka. 25-30 units a night. At the end, I stopped eating and became extremely malnourished. My only calories were from liquor.
I don't want to scare you, but at this stage, you really need medical attention, sooner rather than later. Your body will give out. Mine did and I ended up in a coma on life support. When I woke up, I had 7 IVs, pumping in all kinds of vitamins and minerals that I had deprived myself from because of drinking.
I now have what's called avascular necrosis. All the alcohol killed the blood supply to the joints in my hips. I know that feeling of pain with every step. I just had to have a double hip replacement and I'm only 31.
Please see a doctor asap. In fact, I would go to the ER if I were you. This isn't the kind of thing you can fix on your own.