Bluish white smoke while driving

[cypher279]

Hi everybody, so a few days ago I was driving back from the shop literally on my way home to change the oil and do some routine maintenance, and out of nowhere a huge cloud of white smoke started pouring out of my exhaust. The engine temp was alright, and the car kept running just fine, but then when I stopped it I noticed the idle was pretty high (~1000rpm) and it felt erratic, jumping around a lot and vibrating. I decided to take it home regardless of the smoke since I was very close (probably not the best idea). Does anyone know what might cause this? I know it's I'm not giving you guys a lot to go on but what should I check? I read that this might be a bad air oil separator, but I have no idea. If it helps at all, it's always leaked a little bit of oil, and at one point it leaked coolant but a mechanic took care of that. But that mechanic also stripped out my drain plug so I'd rather not take it to him this time. I don't need to be driving it right now so I wanted to fix it myself if possible. It's an 01' Boxster S tiptronic with about 61k miles on it. Any help would be much appreciated.