MacOS HS Siri not working

Whenever I activate Siri (ether by Command+Shift or the app button) she does not work. The Siri orb-thing is frozen and if it does recover, it says there is a mic error. This happened all of a sudden and has not worked since. I'm not sure if it's a bug or just a glitch on my computer, but if anyone else has this problem, please post! Thanks. :-)