No no no! Don't get cable. Don't lose hope just yet!
You might wanna get in touch with some of those stations and see if they are doing any frequency changes and
ERP power changes. Some channels will be cranking up the digital signal to full strength when analog is shut down.
Think of it like a scale, one side has digital, one side has analog, the analog weighs more, causing the digital to fall off the scale. When the analog is taken off, the digital is balanced again.