Analysis paralysis which can be caused by over-thinking a situation and getting stuck.  During stressful times, a common reaction is to overthink things. In this state, rather than identifying some useful action plan, your thoughts simply become more and more agitated as your feelings worsen. A sort of negative feedback loop is initiated. You think; that makes you feel worse; so you think more; which makes you feel worse; until eventually your mind is in some sort of melt-down. Understanding when this eroding process is taking place allows you to simply stop thinking and accept that you are in a negative state. You actually need to sit with this state or find some distraction – you cannot think your way out of it.