Trouble exporting audio in premiere pro cc 2018

I've spent about 2 and a half hours learning premiere pro and making videos for my new gaming channel. The problem is, when I export my video, there is no sound after the first minute of my video. I've made 2 videos previously with no trouble. The only difference this time around is that I've used the audio panel to make some edits to nested audio tracks. I applied the balanced male voice profile to one track, and the background music profile to another track, and no profile on the 3rd track. In my first 2 videos I didn't use the Audio panel at all.