Engine Oil Leaking problems of the 2000 Audi S4

I just did an oil change myself on the car and I noticed. (before the change) that the whole bottom of the engine was covered by oil. So that is there was an oil leak. I think is it from the head cylinder gasket, this should not be happening in this early stage of the car since my last inspection was only 8000 miles ago. I just hope it's not worse since the car has lost some power. The total cost was an insane $1500 because the head cylinder and bottom was send to be resurfaced, if you need it or not. Dt.