Well as you know this website does not provide any form of treatment, so you can consider going to a therapist and trying to use techniques to help you break out of this depressive state. The best type of therapy I would recommend would be Cognitive Behavioral Therapy (CBT). CBT has a premise that your symptoms are caused by negative thoughts, so if we change your thought process to be more positive and objective, then your symptoms will lessen as well. Here are some examples of CBT techniques for you:
So this link may help you, it contains a technique I use with patients called a thought record. It will help you keep track of any negative thoughts you have. You put the negative thought on paper, the emotion accompanying, the evidence to support it, and the evidence against it. Then I want you to come up with an alternative thought for the situation (more objective and plausible). This will help you change your way of thinking to be able to think more positive and not automatically go to a negative type of thinking.
In addition, these two worksheets are very good at helping to lessen negative type thinking. It can help you focus on the big picture and the objective/positive thoughts and outcomes.
Also here are some Free comprehensive CBT websites where there are many more techniques that you can use as well
Also I would highly recommend that you go to the store and purchase two natural supplements of St. Johns Wort and Omega-3, which can significantly lessen your depressive symptoms within a matter of weeks. But if the symptoms continue than you may need something stronger like a SSRI antidepressant, which you can get a prescription for with your doctor.