Oh @newbeginnings22 - despite the hopeful user name you are in such a dark place.
No wonder when your whole world is turned upside down and three little ones are with you as you embark painfully on a voyage into the unknown.
Nothing is going to take your pain away sadly, wish it were not so.
But there are life belts you can cling to in this storm, that will keep your chin above water until these emotions gradually make way as other better ones come through.
Despair and grief and bewilderment will have to share a bit of space with pockets of anger which can forge into determination, gradually the odd ray of optimism may break through the clouds. A surprising shower of calm when you suddenly realise you've just done something that used to be a huge problem but now isn't...
Though joy and happiness are still a far away prospect, equinamity may arrive sooner...
How to encourage these changes?
I think of it as like the gut biome, (bear with me), when we have all the healthy bugs in our tummy, the awful ones that make us sick can't thrive so to we do things to allow the ones we want to flourish. Eat fibre and a good balanced diet etc.
The emotional equivalent will help this pathogenic set of emotions to subside... Things like
Talking to wise and supportive people.
Reminding yourself this is not an uncharted journey - many people have been here before you and some - knowing how dark it is where you are right now - have left guide ropes and handholds for those coming behind in the form of websites, blogs, books, law guides etc etc ... Search them out and use them to help you through.
Try to notice what is ok right now, when you catch your despair casting thoughts ahead ask your mind to come to the present and think what is ok right now - kids had breakfast? That's good. School mum smiled at you. Ok. House still yours to use? And breathe... Ask your mind to change focus, dial down the torture.
Ringing the changes, what is possible and positive that you couldn't do when he was around?
I'm sure there's lots more but as a starter
One thing we do know is, hard to imagine though it may feel now, in five years time, but even less also, you will be feeling very differently. One day at a time you'll come through.