Sherlock was weak and dazed. He didn't want to get up. He felt so drainned. John was likely to nag him about his health if he found out. He opened his eyes and looked at her.

The detective was wobbling after she managed to help him up. He tried to stay up right as he could. He wanted to carry on with the case, but he didn't want John nagging him.
He was also really tired.
Sherlock let her guide him to the cab. Though he was letting her help him. Didn't mean he would ever say thank you though. He looked very dazed and pale.

He knew that he would need to eat and lay down for a bit. He was meant to be taking it easy since getting out of hospital. He closes his eyes once they are in the cab.
He was looking somewhat half asleep by the time they got to his place. He looked around opening his eyes again. He knew that he was not normally this sleepy.