This happens to me if I have been under stress and pushing myself to get things done for a long time without having enough break time for refreshing up my mood and energy. Then I feel down and can't use my time passionately and efficiently on what I have planned to. This is why we're told having a balance of fun and work is important. Depression and other mood-influencing issues matter too which make life so difficult and complicated to handle.
Hopefully everything goes well and you can get the most out of February and rest of this month.