Stupid Spokes

Stupid spoke on the rear wheel of my roadie is broken.  It wasn't broken when i hung it up after my ride on sunday.  It was broken when i went into the garage on monday??  Stupid thing must have broken overnight.  I have never seen or heard of that before.  I just don't have the time to go to the shop to get the spoke replaced this week until after exams (friday) so i don't have a roadie to train on.  i am seriously missing my nice get out of the house for an hour on the bike time.  oh well.  might be time to invest in a new wheel (the old one has had to deal with my weight sitting on it for over two years now, might be starting to wear out).  stupid spokes.