Mine was based on anxiety and fear. Identifying the triggers and working through them helped me move forward. For me, it's easier to worry than do something. That is changing.
My counselor focused on me being in the best place possible to be able to make the best decisions. Doing healthy things helps immensely as does balancing what's lacking in your brain chemicals during this stressful time (which extremely drains them).
My psychiatrist found that at one point even though the medication does was effective, it was not therapeutic, i.e., I would be fine but if I missed a few doses I would plunge into depression and anxiety.
Once I accepted that my brain needed the chemicals it was lacking, even if it was more than I wanted things went much better.
Oh yes, consider getting a GoLite or something that provides the appropriate light that missing in the fall and winter. It's a real mood picker upper. I found that my moods followed the weather. If it was sunny, I felt sunnier and energetic. If it was cloudy, I felt gloomier and lethargic. Who'd a thunk?
It's amazing how many hints our bodies give us. Not enough sleep.. bang, depressive feelings. Drinking.. Shabaam, feeling something's off for 24 to 36 hours. Not enough light.. Oopsie, feeling a sense of darkness.