You sing , I dance and We all steal things

Nobody is perfect (especially me) but I don't know why my guitar sounds so funny all of a sudden. I was practicing while watching a vid on my laptop when I realised something was wrong with my guitar. At first I thought it was just bad tuning, but the whole string was bad, no matter how I tuned it.... SO, I haven't touched my guitar in almost 20 hours.... OMG OMG OMG OMG.......... no la jking. anyway I was thinking of performing for teachers day but then I came to my senses... WHY SHOULD I BE DOING ANYTHING FOR TEACHERS WHO GIVE ME CHINESE HOMEWORK???????