Prayers for your dad, you, your mom.
Does you dad have any heart trouble that would make general antithetic a special risk? Does he have other complications? Ordinarily 72 isn't considered really old these days, So I'm hoping there are no high risks for him--hoping & praying. But of course you're a bit of a mess over it. I sure would be.
The work change is horrible! Why do they have to do these things? As much as possible I hope you'll be able to stay in the present as these changes take place. If you can just focus on each day & try to absorb
those changes without projecting about how they will impact the future, you'll have a better chance of staying grounded & balanced.
Try to keep these two things separate. Together, they're bound to overwhelm you, but if you can manage to keep personal & work apart you will have a better chance of carrying the load.
We're here for you. PM me if you want.