My longest depression that I could think of was pre-diagnosis. The pattern seemed to be from mixed to regular depression, then mixed again, then depressed again. All together, I believe this lasted about seven months where the depressive symptoms were present and very severe. It was back when I was in high school, and I spent most of the time in the guidance office since focusing was impossible. My mother had insurance issues, and I went without treatment. Every minute seemed like an hour, and during most of that time, I felt paranoid and super sensitive to every little sound. It was agony.