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>>How often have you been offering him after his regurges? What size prey items?

If you have been trying to feed it on a regular feeding schedule you need to give the snake time to recuperate.
When a snake regurges you want to give it 10 to 14 days before attempting to feed again. repeated feedings and regurges can result in "regurge syndrome". considering 8 regurges, I would be confident in saying your snake won't make it without a vet visit. A vet would not recommend force feeding.
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Corn snakes and rat snakes...No one can have just one.
"Resistance is futile"
Jimmy Johnson
Draybars Snakes