Can't hear audio after a certain length of time

I was trying to record my first podcast episode today. When I went back over it to listen to what I had already recorded, I noticed at some point the audio just stops. It still looks as if it's recording and if you move the line forward or backwards over those areas you can hear speed up audio or backwards talking. But if you just press play over whats already been recorded you can listen for a little while and then the sound just stops. Any ideas why? I followed the tutorial before I started. But 30secs for a intro doesn't seem to be a problem. Talking for 3-5 minutes and go back to listen to it thats when the problem starts. I guess around minute 3 the audio cuts but it's still recording. And I don't think it's my mic because it records fine (although the quality isn't great) in a different recording program, which I would use instead but it doesn't let you edit your audio afterwards.