Thanks for all the minute detail in your story; I likely would not have "got it" without all of that.
Just remember, when any electronic device (including an Echo) acts up and doesn't work as it should, your first line of defense is to turn it off and then turn it back on. So the way this is done (since it doesn't have a power switch) is to pull the darn plug from the wall. Wait a few seconds and then plug it back in. and all will likely be fine again.
(I add this last level of minute detail, because when my good-est friend told me he had sent his wife out to get a battery for the Fire Stick remote before the Super Bowl began, I asked why -- and said the battery should last forever. He said it was because the remote could not get the home menu to come on; the TV screen remained black. So, I said turn it off and back on. He asked me how, since it does not have a power button! Well, I in-patiently explained how, and when he turned it back on, the Home menu was there, of course.)