tired day with no work

a tired day went by, just penned down an assignment and did absolutely nothing......but tired like hell....a good dinner from a bengali stall gave me some energy though....but still the question remains why and how on earth was I tired. I guess its sheer laziness to complete the jobs at hand, exams two blocks away, need to buckle up, if they go up to my head it will lead to one thing which could also define the reason of having heavy eyes in a light day, that thing is frustrations..............