Form of depression

There are times in our life that we just get tired of everything, I guess you can call it as a form of depression because you get tired of repeating the same thing over and over again. Its hard to keep your life focus in the right direction but you can't give up, you had to get your life back on track. Sometimes I feel like this myself but it doesn't last for too long thank goodness. There are times also that I think I am useless and my mind gets cluttered with too many things. I think it might be because I worry about small things too much and what is going to happen in future if I am always like this. Do you guys feel the same way sometimes?