Blood sugar / glucose monitor?

I Shakes, sweat, delirious, confused.

That is exactly what I USED to get occasionally when I was younger, more hypoglycemic. Nowadays I sometimes have just "beat down" "low energy" some of this is difficult to describe. Sleepy, lethargic sometimes. I'd like to eliminate what I can so far as causes.

It damn sure isn't old age LOLOL (I'm 73)