Joey you are a brave babe
I hope your ILs aren't there for too much longer. It takes a lot of courage, do you feel some sense of relief after saying it? I'm of the school that 'life is too short to be unhappy'. We don't know what's around the corner and we have one life to live. (that we know of) Please be kind to yourself. If you need to rant, let it out! Leaving a long term relationship or marriage is a grieving process. I found writing stuff down really useful and asking myself, who, what, where, when, why and how. I'm sending you hugs and strength.

Elba oooooh the port hangover, I'm very familiar with it
head turning, delayed brain
sounds like you needed a fat coke & bacon sarnie. I'll be hot on your tail during Dry Jan
Remember when you couldn't even contemplate one night without a drink
Be very PROUD of yourself - you have achieved so much
It's just 31 Days, DON'T, whatever you do project ahead of this! Just aim for one day at a time, think of the hangover free days, your clear head, much more focus, improving your running - the benefits are endless. Remember the good times, there will be many more
And remember to watch the film to the end, it's never a pretty sight 