I Blew up my Engine, please help!!!

[mlambrecht82]

I was driving down a country road steping into the boost and I heard a loud bang and the vaccum gauge went going back and forth between -10 and -5 psi. There is usually over 20 lbs of vaccum pressure. I pulled over to the side of the road and turned my car off. I looked under the hood and couldn't see anything wrong with it. I tried to start it again and I heard a knocking from the right back passenger side of the engine. The Boost gauge did the same thing as before and the car wouldn't start. So I called a tow truck and while I was waiting I thought I would try it again. This time it started up and was makeing 20lbs of vaccum pressure for a couple seconds then started knocking again and the gauge danced back and forth then I killed it right away. I'm hoping that it is a head gasket or something to do with the valvetrain, so I can just fix it myself. But I'm afraid that I blew a piston or bent a rod or something. The big problem is that I live in California and I will be starting school next week in wyoming. So I need to get the car fixed in a week. I don't know of any shops that will rip a motor out and rebuild it in a week. If you guys know what could be wrong please let me know, I really need to get this fixed. Thanks a lot for your help.