I think if it was a raccoon it would have been back for the eggs. Put permanent marker dots on the sides of the eggs that are up and see if they are turned in a couple of days. You never want to just get rid of eggs because you are guessing that the Mom is gone. It needs to be pretty definite. Sometimes they are just sneaky. And yes, the eggs would be cold to the touch right now because if she isn’t finished laying then she isn’t incubating yet. Don’t rush in taking those eggs out. It does sound like something might have happened to the momma, but please make sure.
Tammy