As I was coming home from work today i noticed my oil light had come one, i figured it was a sensor problem because a month ago i had gotten a routine oil change and i figured it was no biggie. When i got home i decided to pop the hood and check the oil and when i checked the oil the rod was clean as a whistle thats when i knew i had a problem. i went to autozone and bought 5 quarts oil and put 4 in thats when my light disappeared; Good sign, i thought, i waited a few and decided to move the car forward, about a length, and to my astonishment my 4 quarts where on the floor. Now, i am in a state of shock as this is my work vehicle. By the way, i neglected to mention its a 99 type sh. Fast foward from when i moved it, i reversed my car to find out that the oil is leaking from under the drivers side. anyone know what could this be? i really need some answers.

thanks.