From the last some time i am feeling disinterested in everything, sometimes there is a pressure in my middle of chest and it feels like everything is worthless, i feel like nothing is good and feel restlessness most of the time and when I don't have my phone with me it increases two folds, but sometimes i feel cheered up for sometime and the next moment i am again at that level, i feel nothing wrong in my body but this feeling of disinterest is rampant, I don't feel like doing studying, watching tv, watching movies, playing games. I am worried when will it get back to normal!