No matter how long I go with neutral feelings, I always seem to be especially vulnerable to slipping back into phases of depression. It seems as though my tolerance for stress, change, and disappointment is very low. If something goes wrong or I fail at an endeavor, I find myself becoming quite depressed. I think that since people like me are already on the edge, we can very easily fall back into a negative state. I wish I could change this though, I know it is not rational to become so worried about so many things. Anytime something negative happens unexpectedly, I began to start thinking about all the possible problems that could result from that negative occurrence. I don't just think about immediate problems, I also think about problems that could occur years from now. I worry, worry, and worry .... and my productivity decreases significantly for hours or even days. I have a lot going on right now, for someone of my mental and physical abilities, so whenever I waste time worrying, I get even further behind and then worry more. I find it so odd that I worry about such petty issues sometimes. I've been though a lot in my life. I should be more confident about my ability to survive in difficult situations. I shouldn't feel like everything has to go the way I plan it.