Don't worry. I have the flu quite badly, I can't talk and my day is full of drowsiness, headaches and painful coughing.
I was told by my college if I don't have all the work uploaded and arrive tomorrow to college then they will kick me out.
Keep in mind I have A's and one B.
The stress of a job and college life, having my girlfriend rarely visit.
It's difficult, but nevertheless you should try to motivate yourself in ways that works for you.
The way that works for me is simply asking my self "Why am I doing this?"
Let yourself think about that and ponder about it, the future and what will happen if you don't work now.
It gives motivation, maybe not the nicest kind of motivation, but I'm sure you'll be thankful you scared yourself into having a better future.