Pamela's battle with Zal'Zerael occurred for more than thirty minutes, and in those thirty minutes, Corey had regained his consciousness.
Before he lost consciousness, he assigned certain duties to his stars of consciousness, and one of them was the recovery of his body and energies.
The injuries he sustained against Aethara were grievous and lethal, and what made it worse was that his dream energy was extremely low, about 1%, from the moment he lost consciousness.
This made it difficult for his stars of consciousness to heal his body rapidly.
However, luckily for him, the rate at which he recovered and absorbed dream energies was extremely high because of his Paragon's Celestial Veins, his Cosmic Soul, and his stars of consciousness which managed the recovery and absorption rate of his energies to the best of their abilities.