Mic no longer recording

Hi! I’m brand new to Audacity and I’ve been recording music and trying to multi-track. I was trying to find a way to play the existing sound through my headphones so I could hear it while recording new parts, but I messed up my audio set-up and now it’s not recording through my microphone, even though it says that’s my recording device. My computer is picking up from my mic, Audacity just isn’t. I don’t use any other connected software + I’ve quit and re-opened Audacity and that didn’t work. Any advice??

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…I’m a Windows guy and that’s all I’ve got.