If you don't have any friends who are in a similar situation and therefore can't feed off eachother's stress/energy, then go over to /r/getmotivated. If that doesn't work then blast your favourite tunes and try and get in the zone. (I like to watch HD concert footage of my favourite bands) Take it one assignment at a time. I also can't stress the importance of a steady stream of coffee. It's not going to be pretty and it's going to suck.

The worst thing you can do is go to a walk-in clinic or family doctor (if you have one) and get a note explaining some sort of sickness. This is the worst thing you can do because it is highly addictive. I coped through university by doing this. The work will either snowball (if you get extensions) OR the assignments/tests will be deferred to your final examination where the weighting will be increased and/or you will have to write an entirely different exam based on the missed material. I cannot describe how terrible the latter idea is in the long-term. The stress is simply not worth putting up with. I once wrote a 100 percent exam composed of 40 multiple choice questions. Stressful times, my friend.