Audio stopped working

I've put hours into editing this video with zero technical issues. Sound worked fine, video worked fine, everything fine. I connected my laptop via bluetooth to a speaker and suddenly the audio is gone. It's not even registering in the mixer or meters. So I disconnected the speaker and disabled bluetooth then restarted the program and still no audio. So I restarted my laptop, still no audio. Mind you it's just davinci resolve having the problems here. Everything else sounds fine. Finaly I tried exporting the video to see if there was audio in the export and thankfully there was. I tried messing with the bitdepth of the audio and making sure nothing was muted. I'm at a loss as to how to fix this issue. Please advise, thanks.

[Peter Chamberlain]

Check the preferences, video and audio settings, make sure you have speakers setup to internal.