Can't find sound devices in Debian 10

So I installed Debian 10 on the secondary SSD I installed on my Acer Aspire E15 E5-575-33BM recently. And until today, the sound worked fine. I've no clue what changed today, but today my sound was kaputt, and I can't even get a sound device to show up in Settings.

Yes, that's right. PulseAudio has disappeared. ALSA has disappeared. When I try to start up Pulse Audio Volume Control, it gives an endless "Attempting to connect to PulseAudio, please wait ..." message.

I don't know what to make of this. I'm hoping someone here can help.