I'm an herbalist and student of Traditional Chinese Medicine. According to TCM pain cannot exist without a fundamental blockage of qi and/or blood. Generally this falls under the pattern of stagnant liver qi. Move your qi! Express yourself, dance, draw, paint, permaculture design, whatever it is you do. Do what you love. Exercise, move your body and let the energy flow (qi gong is great). I find these three things do be of utmost importance. If you are having a bad day, think, "Have I exercised? Have I expressed myself creatively?", most likely after you do so you will feel a whole lot better.
As for herbs. My favorite herb for treating depression in general is Albizzia, also known as mimosa, or the tree of happiness. The bark and the flower are effective for all sorts of emotional issues, probably the most effective herb for depression. The plant is also very beautiful, and fixes nitrogen, whoohoo stacking functions! Here is a great article about this wonderful plant...http://www.planetherbs.com/specific-herbs/albizia-the-tree-of-happiness.html
I'd also recommend that if someone was experiencing serious depression, and not getting the results they need with treating themselves, to see a practitioner of traditional medicine. Generally either Traditional Chinese Medicine or Ayurveda. It is not always as easy as this herb for that symptom, but requires a more holistic view of the unique energetics of the person, and what herbs can balance those energetics, a subtle art indeed. You deserve to feel good! Some times we need some help from an experienced healer.
Blessings
