time machine restore hung?

Hi everyone. I am having a time machine issue. I am attempting to restore from backup. I started the computer in restore mode located the backup (two days old) and proceeded to select restore. My computer screen shows the “time machine system restore” screen, says it’s “restoring,” and it then Says “restoring files … time remaining calculating.” For many hours now I have also been getting a spinning pinwheel. And no progress appears to be being made. Photo attached. 

Should I be letting this play out or is this hung and so I need to hard restart and deal with the fallout?