Ah, much better detail.. And we are ALL STILL trying to make sense of MANY things.. so don't feel bad..
Can you play the sound file in WinAmp or some other audio player? Does it seem loud enough. Play a music file through that same app and compare it..
Just because its LOWER in volume doesn't mean that its not loud enough. It just means it not as loud as you expect. Music, movies, computer games, etc are normally all mixed to the LOUDEST possible volume which is great for final mix, but not good for tracking or recording. Think of it like this.. If two guitars are recorded at "11" and your speakers only go to '15" what happens when you play back both guitars at the same time.. DISTORTION, because your speakers only go to 15. not 22! (11 + 11)
In other words, you might not have a problem at all! Your NLE should have some sort of sound mixing function where you can TURN up the level on the TRACK.. Figuring out HOW loud is LOUD ENOUGH is not easy and takes practice.. generally, just watch your audio level meters..