Makes sense to me that thepea is being "sensibly careful," responsibly concerned, perhaps "worrying" about the things that need to be "worried" about -- but I think for simplicity, I wouldn't use the word worry there.
So how to tell the difference between the above and "worry" -- I think perhaps worry "grips" or "contracts" -- there is a visceral distinction. Worry seems to have an element of "fear" -- reflecting an attachment to something, for example, to a certain sense of self -- "I should be able to keep bad things (of a certain type) from happening;" "I want to be perceived as someone who..."
Something like that anyway...
"Why is it, Master Kaccana, that ascetics fight with ascetics?"
"It is, brahmin, because of attachment to views, adherence to views, fixation on views, addiction to views, obsession with views, holding firmly to views that ascetics fight with ascetics" (AN 2: iv, 6, abridged).
Kindly eyes, not verbal daggers.