"Paul was feeling his hamstring tightening up and we maybe asked too much of him," Whites boss Craig Brown said.
Brown thinks Healys injury is less serious: "We are hoping with David it is a kick in the cals and not a strain because a kick will heal more quickly," he said.
"A pulled muscle would be a disaster for us.
"If Healy's out we have only Andy Smith and Richard Cresswell left up front."
