I have really bad depressive states for months on end then something random but in a good way might happen me, it could be a big thing (e.g. got a new job) or something insignificant (e.g. watched a good movie) that makes me feel happy. Then I go to this incredibly happy state when life is beautiful and literally nothing can bring me down (e.g. boyfriend dumping me/ failing an exam) until something just clicks randomly and then boom im back to normal depression. The happiness usually only lasts for like a week or two at most then back to being really depressed for months. Its actually so horrible because I feel like im on the up and then it all comes crashing down again. Is this normal for people with depression or could this be a different problem.