2months ago my uncle expired due to bike accident, from that time onwards negative thoughts came in mind, why do I study if one day I have to die, I went to psycatrist they given me some antidepressant, I took it for a month they bothered me more than doing any improvement, I stopped taking that medicine by myself, because it was creating more side-effect than improving, now problem is I lost interest in doing something, whenever I try to do something , thoughts like one day u have to die, why you are doing this comes in my mind, persistently , am not able to think about my future, am facing lack of sleep, my psychology has changed from before, pls help?