I read a book today recommending meditation for balancing out mood swings. Curiously, it's been a meditation retreat that made me so happy I thought I'd never be depressed again in my life, in fact so happy I had thoughts on imminent enlightenment.
But if you haven't yet tried some sort of spiritual practice there is a possibility it might help you. I have been attending service at a catholic church lately and even though I'm not a firm believer of a good part of the doctrine, the forgiveness aspect is very useful. For those of us haunted by ghosts of the past.

Meditation, medication, religion, any remedy for the condition is potentially poison. Possible, Tryingtobehappy5, that medication made you worse, but 10 years of mostly being depressed wouldn't have done much good either. I for myself think it may have been my completely untreated first episode of severe depression that got me into this mess.

What also helps me is to live life like every day could be the last. Especially every day could be the last at my current work. No point in being upset, worried about getting fired, or in working too hard but at the same time an incentive to be nice to everyone, try and make a good impression in case I need a reference. This, however, would only be a remedy so long as it doesn't turn into the solution. I filled a screening test today telling me I should call 911, when my 15min instantaneous PDoc says all is fine because I work. Aouw, what an insightful day!! Work is another such poisonous remedy!!

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Lyrics from The Prodigy, I think the last line has something of a clang association:
I got the poison
I got the remedy
I got the pulsating rhythmical remedy