Big Problem Please Help

Just like the subject line says i have a big problem with my car, on the way back from work the car just started to loose power and just turned off. I tried starting it up and it started but the engine started to shake like crazy, and when i opened the hood there was a skweeekinbg sound comming from around the timing belt. My guess my timimg belt has come of or completely snapped,,,,,If anyone has any suggestions please respond. Thanks

id guess its your distributor, mine did sort of the same thing. if it were the timing belt youd already be fucked. good luck