Yes, Pepper was annoyed and was having a whole lot of feelings she didn't really know what to do with. She'd received a text message from a stranger, a woman, who clearly knew Tony and had shown up as soon as she found out he had been hurt. The truth of the matter was that Pepper was jealous and it was the first time she'd ever felt that way over Tony. Maybe the jealousy was just triggered this time because another woman was getting in the way of her fussing. Pepper liked to fuss. Fussing over Tony gave her something to do... but it was also more than the fussing and Pepper knew it. She was starting to have real feelings for the person she'd tried so hard not to. It confused her, annoyed her and she didn't really know how to deal.
So, Pepper had spent most of the day down in the cafeteria. She told herself it was to let Tony rest, but it was more than that. Things became even more confuddled in Pepper's head when she headed up to the room only to spot a gorgeous blonde woman talking to Tony's doctor. Pepper could only assume it was the woman from the text messages and she wasn't about to walk into that trap so she had gone back down to the cafeteria to hide.
Now that she was certain the coast was clear, Pepper made went back to the room, blackberry in hand. She was hardly looking where she was walking when she entered the room.