So Unmotivated

I don't know what's wrong with me, but seems like every term 2 I will lose my motivation in doing my assignment. Seriously, when I tell myself to do my assignment, the first word that come to me is "UGH!". I don't know what happened, I really really feels sooooooo unmotivated and moody. I also feel that everything is boring. One side of me feel so worried because I slack so much this term, while the other one don't care about anything because it feels like a torture to start working on my assignment. Somebody help me!!!!!!