Sleep in own bed?

My son is usually very good at sleeping in his own bed. But on Saturday he fell and broke his toe. We spent the evening until the early morning in the ER. He slept that morning in his own bed because he was so exhausted, but ever since he is refusing to sleep in his own room. We have a bed made of pillows in our room for him, but I don’t want him to get used to sleeping in there every night. I understand he went through a trauma and that’s why we have let him sleep in our room since. How do I get him comfortable in his own room again? And how much longer should I just allow him to sleep in our room? Only kind words and thoughts please!