Clint was waiting for her to wake. He knew it was his fault. He couldn't seem to get that out of his head. Even if he hadn't been himself when he did all that. He knew he had to apologize he was just scared she would hate him.
He knew he would deserve that.

"Oh Tasha... I'm so sorry." He quietly. He knew that she maybe angry at him for awhile. Clint felt like he would have alot to explian. He hadn't been himself for awhile. He almost forgot what it was like to be able to think clearly for himself.
It had felt like he would never get to be himself again.
Natasha was important to him. He never wanted to harm her.

Still feeling sick from what he had done, he ran to a bathroom and threw up. He was groaning. If he had killed her he didn't think he could ever forgive himself. He still had no idea if she was going to live.
He walked out after and sighed. He knew he needed to calm down and not panic.
Barton sees the Doctor "Oh ok.." He was glad to hear she was alright and went into room.