Insurmountable odds?

I awoke at 4:00am with a worried mind,
Thinking about the future churns my guts,
I’m concerned I won’t have the strength I need,
To deal with the level of change required,
With age I have less will, I need less mental ‘weight’,
Navigating some days now is a real challenge,
I simply don’t have the energy or drive for much,
I feel constantly fatigued and yet I cannot sleep,
I’m running out of time, resources and loved ones,
Work seems over demanding with load increasing,
My mind keeps shutting down when I need it,
Like it has a constantly tripping surge protector,
But I don’t know how much of this is real,
And how much is my mind fabricating woe,
But it’s constantly on my mind, and it is exhausting,
Who knows if I will ever truly rest.