Lois had spent nearly every night since the 'incident' listening to the man she loved relive what he considered his greatest failure, his fall from grace, over and over again in his sleep. Even after the effects of the various gasses, toxins, and kryptonite had been purged from his system, Clark had still suffered almost as though he were under their influence.
It was guilt, Bruce called it psychosomatic. He also said that Clark was innocent, and Lois didn't need anyone to convince her otherwise. She knew her husband better than anyone, and knew exactly the kind of control he had over his powers. For him to lose that control, he would have had to have been pushed to extremes; and it would have been done on purpose.
Sitting up, Lois reached for the cloth she'd kept beside the bed they'd been sharing at Wayne Manor. She could count on one hand the number of times she could remember seeing Clark sweat since they'd met before this Independence Day, but it was a frequent occurrence now.
"Clark," she said quietly, wiping his forehead. "Clark, honey, wake up. You're having another nightmare." Shifting so that he would see her as soon as he opened his eyes, Lois turned on the bedside lamp and cupped his cheek. "It's okay, baby - I'm right here. We're all safe."