I can't find my batteries

Today was a day of trying to keep to the, be kind to self, day. After a health scare yesterday today I took it upon myself, albeit grudgingly at first, to just lay off my usual routine if it means I can get back to it with more vigor and energy tomorrow. Admittedly, tomorrow never comes but today I strove to make sure that it will. With my main work was out of the way so nuts to it. rest, tea and toast and, yes damn it, if required biscuit dunking too. I just felt too drained today, power levels in the red. I'm not sure if it due to the last couple of days or if it a dose of....it. I was supposed to do more things today and I was also due out for sporty times tonight but I could not face it. And not because of the usual either. I felt run down upon waking. Never a good sign and generally sets the tone for the rest of the day. There are times when I can bat those concerns away, take stock as the day unfolds but not today.
Today I had no resupply of batteries. Only old ones still on re-charge.
Days like this are a reminder of what I fear. That this will be always. It's a tap on the shoulder from inside, from it, telling me, 'Get used to it. This is you now. Until the end.'
Time for more of The Boss.