No matter the reason for the regurge, I would wait at least a week or two before trying to feed again. The snake's body needs time to recover from the somewhat traumatic event.

And I agree with Robert...if the snake spat it back up right after swallowing it, then the problem is not likely with the snake's body or environment, but more likely with the prey item itself. If it was frozen, it may have not been thawed properly and had either a very cold spot or a very hot spot, depending on the thawing method. Either could cause the snake distress.