Hi @MoiraC. I don't really have anything to add to the excellent advice here. I'm still trying to work out how to handle my rough days! And they're not in the same league as yours. Just know that I'm thinking of you and wishing you all the best.
For what it's worth I go for distraction (TV), trying to focus on other people's worries more than my own, and sternly reminding myself to stay in the moment as much as I can.
I do know that a study found that looking at pictures of cute puppies and kittens on the internet releases dopamine and oxytocin in our brains. So if all else fails! Big bear hug, K xox