So here is some food for thought:
https://forum.audacityteam.org/t/suddenly-everything-went-distorted/59137/1
https://forum.audacityteam.org/t/different-weird-sounds-while-using-audacity/59909/1
https://forum.audacityteam.org/t/how-to-adjust-input-output-levels-during-recording/59617/1
https://forum.audacityteam.org/t/distorted-voice-and-recording-cutting-off-help/25716/2
I hope this helps. 