Sorry to hear of the challenges you've recently experienced and happy to hear your mother-in-law pulled through.
Strange as it may sound your post is a bit of a relief to be honest in a "glad to hear I'm not the only one kindof way".
"then something or somethings pop up and shake the foundation of life as you know it."
My brohter-in-law died suddenly last year and the shift in my own life/thinking has been dramatic.
He is the first of my generation in our family to pass. THere have been younger members who died in one offs and older members who died in what seemed "the natural order of things" but Martin was the first who was a similar age.
Since then I have struggled a lot with "what's it all about", "what's the point", "what do I want to do from here" kind of questions with no answers.
I wasn't prepared for another phase of life that I needed to learn to navigate. I knew I would get older of course and that phsyically I would have to slow down and make changes but I wasn't expecting such a dramatic shift.