Heavy Rain Issues

So I am really loving Heavy Rain, a lot, but the bugs in the game are finally taking their toll on me. At first (Possible Spoilers) I was having issues with the first level you play as Jayden. My car was invisible and it caused the game to freeze up and the audio to lag. I got through that. Then in the level where Ethan's son is kidnapped, I was having very staticky audio. Then in the level with Jayden where you meet Mad Jack, my car was once again invisible and the game was once again freeze, crashing and the audio was lagging. Now I was in the level called On The Loose. After Madison gets out of the hotel room, the audio began to lag and ultimately the game crashed. I tried once again and the same thing happened. Now, the save won't even load. It stays stuck on the loading screen of Ethan's face. I've left it on for like 15 minutes and nothing. I've tried replaying the level before hand and no luck either, it freezes once I get to the On the Loose level. I really hope someone can help me out here and tell me if there is anyway that I could fix this problem. If it means going back to gamestop and exchanging copies I'm more than willing to as I still have the reciept.

You should post *SPOILERS* in the thread title...

I've tried that nightshade and it didnt seem to work. in fact, the save actually started behaving like this after trying that. :/ do you think it could just be a bad copy of the game since your's seems to be working fine?

Probably youur disk because I have had no problems with glitches in my 30 hours of playing.

I think imma let the game rest for a day or so, play something else (just in case that helps), and then if it still doesnt work, exchange it for a new copy at gamestop cause I really dont want to start over at this point