A Dot (Echo, etc) is a computer. What do we do when a computer acts abnormal? We "turn it of and turn it back on to reboot it". So, with the Dot or Echo, unplug it to turn it off, now wait 5 minutes to clear it's circuits, then turn it back on by plugging it in again to power. Give it time to reboot completely and all should be normal again. Let us know if this fixed things or not.