Blown Turbo?

ok so the other day i took my car to the track. The next day i noticed a little bit of blue smoke comming out the exhaust. and then the day after that the car had oil spots all over the back of the car. the turbo still spools fine and doesnt cut out or anything. but now im gettin a massive oil leak, and my cat was smoking like crazy today. valve cover is cracked but no oil is leaking from it. just behind the intake side of the turbo, is a lot of oil build up. i dunno what to do.