check list for a bad situation:

[x] you are lactose intolerant
[x] you decided to eat clam chowder for dinner the night before a midterm
[x] you come home to find that your roommate clogged the toilet
[x] you have no plunger
[x] your roommate leaves a note on your laptop saying that she had to go to class
[x] you don't know anyone around your apartment complex that would let you use their bathroom...

this is going to be a long night.