So I drove my car home today it was fine until I got off the freeway it wanted to die it rev'd itself up and then finally died I turned it on and has problems accelerating when it just idles the car just dies the engine is knocking pretty loud I need help please

 

You really can't diagnose over the internet with almost no info.

It sounds bad and instead of trying to figure it out yourself. Get someone with at least some mechanical knowledge to check the basics. Compression, spark, plug condition etc.