i always keep thinking about somw particular thing in my mind, very very small things that doesn't matter anything. And my mind keeps that thing for almost one month and then the new thing comes and so on.This i giving me headache and sleepless nights. The main problem is that It's a not big major issue that runs through my mind, it's very simple things that even doesn't bother me or not related to me even but the thinking is 24 hours in my mind and i cannot concentrate in anything,literally anything !