I was depressed for 4years, but I have finally understood a lot of things and I no longer have any reason to be depressed. I was very motivated, confident, and hardworking for 5 days, but all of a sudden I am depressed again for absolutely no reason, I have became unmotivated, unconfident, sad and stressed again. Why is this? Is something wrong with me? Am I fated to be depressed even when I achieved reasons to not be depressed?