Greg's pause, although momentary, was enough time for Theo to slip back into semi-sleep, although he was still awake in that he was watching Greg and his eyes were half-open. He was normally a lot more... aware than this, but the weeks at home on constant hyper-vigilance had taken their toll. Theo needed at least another two days of comfortable sleep before he'd be back to normal enough to be able to maintain his former acute-aware state.
The small breath he drew in when Greg stooped to lift him back up was almost inaudible, but it may as well have been a shout for how out of character it was for the Slytherin who was usually so stoic about his own discomfort. "Oh..." was all he said once he'd gotten over the shock of being lifted up.
Greg was warm and Theo was cold, and he couldn't do much more than lean heavily against the bigger built boy and leech some warmth, mumbling something that might have been agreement, might have been telling Greg that he was fine (which was more than likely) but he didn't move back from Greg. He still thought he was asleep, because none of this was making sense to him.