You feel tired and sluggish and if you need to take rest, you should. Go to bed earlier if you feel that you are running out of energy. Pushing yourself too hard is not going to do any good, just slow down. Do less than usually, energy will be back soon but for now you need vitamins and to take it easy. Prioritize between the mandatory and the not so important. You feel betrayed by a coworker and you will confront him or her. You are not going to let the situation go without clearing it.