Why don't i have audio for my Nexus 6 anymore?

I updated my phone a day ago to Android 7.1.1. Everything was going fine today until I realized that I stopped hearing Waze during my commute. I discovered that I can't hear any media or voicenotes at all. After noticing that I also couldn't leave voicenotes, I tried a phonecall which also doesn't work since apparently the mic is acting up too. I can only use the speakerphone feature. Is this hardware or software related? And how can I fix it??