It’s the whole vibe of your response - the whole feeling of helplessness is often associated with depression, being overwhelmed by life is also a very frequent symptom of depression.
Being high-functioning and motivated to carry out with life doesn’t mean you’re not depressed.
I’m not saying you are depressed, that can’t be diagnosed over few simple comments, I’m just saying you sound like you might be depressed and it might be good to go check with a professional if that’s the case.