Hello TearDroplet, and welcome to Seven Forums.
Double check in
Sounds in the Control Panel (Icons view), then look in the
Recording tab, double click on your default recording device (Microphone) with the green circle checkmark icon. Next, look in the
Levels tab to see if you have an option to increse the DB level or like one below of the microphone to help make it louder.

Hope this helps,
Shawn