hi i started my 02 wrx in the morning and a weird whining/whistling sound kept going until it warmed up then it stopped a little bit then i drove to work (less than 2miles) and i saw smoke so i popped the hood and white smoke was coming from the turbo and sometimes when i do "spirited driving" when im at full boost my cars rpms drop about 1000 and then go back up if anyone can tell me whats wrong please do thank you