Matt - that is my story with some minor details changes like wine/vodka instead of beer and a son instead of a daughter.
My drinking also spiraled out to including days during the week, even at work towards the end, very recently.
"a symphony of misery and failure all clanking together" - beautifully put, tragic and pathetic at the same time. I know that pain.
There's plenty of support and wisdom here. Question is, Do you you have a plan?