One of many places where Chinese medicine excels is in the treatment of depression, anxiety and other common problems of this type. It's a relief because these problems are so debilitating, and Chinese medicine is a relatively inexpensive way to address them. Not to mention that while you're dealing with the depression, you will be supporting your body systems in a number of other ways - ultimately leading you towards a more complete state of well-being.
Your yoga teacher was spot on when she talked about anger/rage being a source of depression. It is not the only cause, to be sure, but it is one. In CM we talk about extreme emotions (of any type) as stagnating the Qi of the body, especially the Liver Qi. The Liver is classified as a Wood organ. When we think about wood not as the dead stuff we make floors out of but as the living vital flora of our forests we can think of it as spreading, moving, outreaching, striving for the light. When something like a very strong emotion comes in it stifles that spreading motion and when the Liver gets stifled, it can shut down pretty much everything in the body.
The suggestions about food and exercise would also be echoed by Chinese medicine physicians - with some specific suggestions as follows:
1. Continue yoga or any other exercise that involves the stretching of the tendons and muscles. The chinese concept of Liver plays a strong role in the tendons, especially, and some people find that when they active their tendons and muscles strongly with stretches that this alleviates the symptoms of Liver Qi stagnation.
2. Whether through yoga or some other tradition, take up some focus breathing exercises. Qigong can also be useful here. Working your diaphragm strongly will have an effect on the stagnation in the Liver channel and organ.
3. Food recommendations would depend on your attendant symptoms and constitution (such as, do you have digestive symptoms, insomnia, etc?) but two easy things - First, eat well cooked brown rice with a few meals a week, being sure to chew the rice carefully and completely with mindfulness. This releases the inherent sweetness of the rice which is a "sweet food" the Liver loves - it relaxes the tension there. Second, add a little pungency to your life - some spicy foods can help break up the stagnation everywhere in your body - which will benefit the liver. Try some pad thai with extra spice, for instance. Scezchuan peppers are especially useful here.
Also - visiting a Chinese medicine physician might bring you considerable relief. At my site I list several tools to help you find a great Chinese medicine physician.
How to find a legitimate Chinese medicine physician and
7 Features of your GREAT Chinese medicine physician
For depression, I can especially recommend Worsley style 5-element acupuncture, which is sometimes simply called Classical 5 Element Acupuncture. There is a partial list of practitioners
here and if you live in Oregon, I can make specific recommendations. Other Chinese medicine physicians can certainly help, just be sure to check out their qualifications and educational experience, as basic TCM style acupuncture and herbalism has limited effectiveness with emotional/mood troubles.
Sorry to give you such a wordy reply.