Lockbox, I agree with Sugahorse.
That experience of yours is very much what I experience regularly as part of a mixed episode. Sometimes called agitated depression.

I was like that for years, and found that self medicating with St Johns Wort helped a lot (once I had been on it for 3 weeks or so). I avoided seeing a psychiatrist about it for various reasons, including avoiding the stigma of a diagnosis.

It worked for me for 10 years or so, but recently (2 years ago) the St John's Wort became less effective for me, and my depression got worse. Eventually, after several blow ups, short manic episodes, and debilitating depression I got to see a psychiatrist, but not before things got really scary:
The manufacturer of the St Johns Wort I was using changed their formula and dosage, and suddenly I got wired from taking the stuff.
Watch out for additives that function as stimulants in any St Johns Wort preparations (e.g. Ginseng) because it could be what sets off a mixed episode, or agitated depression. That is the worst state to be in - far more dangerous than feeling lifeless and brain-dead, because it makes us so desperate - wanting to claw our way out of our bodies for relief.

I'm now on mood stabilisers and atypical antipsychotics, and the relief from agitation is much better than ever before. I can't take antidepressants because they switch me into a mixed state immediately, even though I'm on stabilising drugs. Maybe that will change, but that is where I am now.

I hope you get onto effective treatment soon.

TS