videos save with no audio, happened out of nowhere

so an hour of recording is bugged because my audio didn't seem to play throughout the entire session. I tested this out of the game, and it's just OBS being weird overall where it won't seem to export with any sort of audio. I've got both my mic audio and desktop audio as the same track -- Track 1 (for my editing software, Capcut doesn't register separate audio tracks). This has happened before, when the audio was on different tracks. But now, the problem just happened spontaneously out of nowhere, it won't record any of my audio anymore -- I updated to the latest version, scanned and checked all of my audio hardware for any kind of viruses or physical damage, nothing is broken. Can someone please help?