I'm sorry that you are having so much trouble with post-treatment depression.  It sounds like you are doing a good job of being proactive in finding ways to cope.  I can't point you to any specific articles that have looked at your age group, but you might try the Young Survival Coalition  for resources on the topic.  I don't think the study you mention was saying that one-third of women have 20 years of depression.  I think it means that at various points in their lives emotional stress will affect them even long after they finish treatment.  So try to focus on getting better right now.  The strategies that eventually work for you with this bout of depression will probably work for you IF it happens again.   What I find happening in my own life (11 years out of treatment) is that I'm fine most of time, but certain events can trigger anxiety.  Keep up with the counseling and have faith that you and your doctors will find the right combination of medicines and emotional strategies that will make you feel better.