The Doctor was laying there. He breathed deeply when she touched his hair. He was feeling rather miserable. He tried to calm down, he was sweating and looked terrible too.
"I know Donna, It is just hard to get over the memories of the time war and the day I destroyed the planet and my race to save the rest of the universe, was no other choice. But I regret it."
He was crying a bit.
Jack looked at him "We are here like Donna says, and getting over memories from any war isn't easy."

Jack wished he could make the Doctor feel better. He makes sure he is warm enough.