Try to use some imagery in your minds eye.
Imagine a washing machine on full spin. All your emotions, issues, worries, hurt, pain, sadness spinning around likes items of clothing at 1600 rpm.
You can’t see anything one thing clearly, it’s all a blur.
Make and take a decision to press stop.
Like an item of clothing, take one issue out at a time and deal with it, as you would take an item of clothing out of the machine and fold it, then put it away.
Explain to your lender, some of your problems, ask for a mortgage holiday.
Ask some of your creditors if you can pay the bare minimum.
Ask family and friends if they can give you some financial help till you are back on your feet. ( You’ll be surprised by people’s kindness).
Deal with the financial things first as best you can. ( Yes, it will take all your remaining energy but at least it will give you some breathing space).
Start scanning for jobs, it’s tough out there for the moment, but people willing to work will find work.
Lean on family and friend. Talk about it to the closest people to you
[ You have already boxed his stuff up which is cathartic ]
Don’t look too far ahead. Deal with issues as you can, day by day. Get up each morning, write down a plan for the day, attack each item.
When your head starts spinning, take a long walk, somewhere green, by some water, a stream, a river, the sea, it will calm you.
Read more of the threads on here. There really are people on here who are in a worse position than you and mostly, the advice given is brilliant.
At the end of each day, as you’ve ticked off all the actions you have succeeded doing, run a hot, soapy bath with a glass of wine. Soak in it till you are shrivelled. Congratulate yourself that despite your heartbreak, you’ve done positive things. You’ve achieved something.
Try not to think of the good times with him or the bad. Detach yourself from him mentally and emotionally, like switching the power off on the imaginary washing machine.
Don’t wake up and think it’s the end of the world, yes it seems like it, of course, but rationalise it, it really isn’t the end of the world.
Focus on you, and just you. What he’s done and with whom really doesn’t matter in the great scheme of things.
Take baby steps each day to get practical things done.
Things will seem a little better by this time next week and much better in a months time and in a year you’ll look back and actually thank him for giving you the chance to eventually move on and live your best life.
It will come.