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Modern anti-depressants tend to favor either working on serotonin or norepinephrine levels.
Cymbalta does work on both, but still favors serotonin.
Your depression and lack of energy may respond better one one that favors norepinephrine, because these tend to give more energy. Examples would include Pristiq and Wellbutrin.
It's also important to have your hormone levels checked, and even the function/levels of your adrenal glands, as the chronic pain and stress you have been under could have thrown these off. You may also need to see if you have developed Fibromyalgia, which can occur after an injury, and can cause symptoms of depression, fatique, mental fog, and other symptoms. New medications approved for Fibromyalgia include Lyrica (good for nerve pain) and Savella (used in the UK for depression, similar to Pristiq).
It may also be time to see a psychiatrist that specializes in managing chronic pain and the mood symptoms that go hand-in-hand with it. They may be willing to try other medications that a regular doctor would not consider, such as medications used for ADD and narcolepsy, to help stimulate your energy level again.