Open up the clip you sent and turn on View > Show Clipping. Those three or four blasts of red on the timeline are overload points. It’s too loud. The sound will be a little crunchy…and it’s permanent. Overload is one of the good ways to kill your show.
I’m very concerned with what the clip sounds like. If you didn’t do any effects or filters to it, then the computer may be trying to “help you.” The noise segment has odd ‘talking in a wine glass’ sound and your voice is changing volume. I don’t think you’re doing any of that intentionally.
So before you start throwing coats and umbrellas on the floor, let’s get basic recording down.
http://manual.audacityteam.org/o/man/faq_recording_troubleshooting.html#enhancements
Some Windows machines have other effects as well. Check in the control panels. I got stuck inspecting a Win7 machine that had sound effects running and nobody told me. None of the quality sound tests worked and I couldn’t figure out why.
Here’s an Audacity setup I’m developing. Right now, it’s only a response to another poster trying to pass ACX sound compliance.
https://forum.audacityteam.org/t/very-inexperienced-working-on-audio-book/36799/52
Koz