I also wonder about when you have a bad week (or month, or whatever)

Is it bad luck? I sometimes wonder, is it bad karma for bad things I have done?

A tiny part of my brain asks, Is this some higher power like God challenging me?

But at the end of the day, all that matters is how you deal with it..

Seems you're handling it well.. If you can keep a bright outlook on life even through the shit, it makes everything seem so much better I think