HELP! Please?

[v1nyd]

Okay so my car hasn't been running right in 3 months and it sucks because I haven't driven it normal in forever it feels like.

Since my car car went into limp mode with only a APR chip I figured it was the turbo because I had 121k on the turbo. So I bought a brand new OEM K04 and a brand new FMIC thinking that would solve my problem along with installing a TIP. Then the car would spike to 15psi then gradually drop to 10psi...sometimes it would only boost to 10psi. So I thought maybe my N75 valve went bad so I bought a ECS Tuning race N75 valve and the car still wouldn't make power. Thennnn I smelt something horrid and the exhaust was smoking so I thought maybe my cat melted so I went to the exhaust shop and as the guy was cutting off my flex pipe because I was putting in a test pipe and 2.5inch flex pipe I already had from a friend I notice something inside the exhaust. Turns out to be part of my cat clogging up my exhaust, once the new test pipe was in I took it for a drive...FINALY the car had some power and boosted to 15 but still dropped to 10 however it held boost this time so it was going some where. Then by the time I got home I notices the exhaust was pouring out white smoke and still smelled...maybe even worse then before like burning plastic. It pours out white smoke so bad when I'm driving people stay back like 10 feet, but when idling it doesn't pour out white smoke only underload but smells no matter what. It's been like this for the last couple of days did I possibly blow my head gasket? or do you guys think maybe my seals on the turbo even though it's new?? So this is my situation and I'm out of ideas and money =[

Any help would be appreciated!
Thank you for your time!!!!!

[haus4]

Lots of white smoke is a blown turbo or your burning up coolant really fast. Does the smokes smell sweet or does it smell more oily? Either way, a cat burning up wouldnt do that.

[v1nyd]

hm...I installed a catch can and a new pressure regulator valve because I noticed oil in my intercooler pipes but when I checked the throttle body hose there was no oil in it so I didn't think it made it all way into my motor. I also have a small coolant leak from the coolant line going into the turbo because I probably didn't tighten it enough but it drips no where near the exhaust.

I'm really bad at diagnosing smells but I would probably say doesn't smell sweet. And you think I could of possibly blown the turbo already with only like 200 miles on it?