"Hungover? Of course not." He snapped. Tony was holding his head. He was indeed hungover. The rage hadn't faded and being angry only made his head hurt worse.
He was aware she was worried, but in this state of mind, he didn't quite care about her worry for him. In his right mind he probably would, even if he wouldn't cut back on drinking.
He would have tried to reassure her.

"Meeting?" Tony blinked "You didn't tell me." He growled a bit. He was not aware she had told him. He was angry. The rage soon faded.
He looked rather miserable after that. He didn't remember being angry. "Pepper?" He was rubbing his head. He went to get his coffee.
"I'm getting my coffee." he replied. He knew he needed to get ready.

"Ten mintues, why didn't you wake me sooner," Tony was drinking his coffee. He eats his toast quickly and the has a quick shower and gets changed.
He goes back out to her "Ok fine lets get going."
The man knew he needed to get going. He still felt terrible.