Mate it sounds exactly like mine.
Mine made that incredible whining noise. CHECK YOUR HOSES and check them quick. check all your hoses going to the boost solenoid and away from the solonoid, check your hoses coming off the turbo, check all your induction hoses basically any hose thats got to do with your turbo.
I didnt and kept driving untill one day the noise dissapeared. I thought i was saved untill i looked in the rear vision mirror and saw so much smoke it was like hiroshima went off again. Lost boost lost basically all power of car. I then pulled all the inlet piping off and looked at the inlet turbine, mate it didnt budge at all it felt absolutely perfect. Spoke to a mechanic he came and looked at it, saw that my boost solenoid inlet hose had come off, this means the turbo was boosting to an infinate boost pressure. He then told me to pull the dump pipe off and look behind the turbo. Mate there was no exhaust turbine to be seen, it had clear broken off the shaft, i picked the bloody thing out of my Cat. So front wheel not moving doesnt mean the back wheel isnt either.
If your still getting a spool and a little bit of boost id say its about to go any minute now. I wouldnt go for long drives if i was you.
Good news is its not a massive job to change the turbo and if it is it can also be a cheap one if you know someone with a turbo. it will take you a day with a few mates. there are some really good do it yourself manuals on SAU that step by step show you how. i used them when changing mine.
good luck mate keep us filled in with what happened.