Overwhelmed also means engulfed by powerful emotions. For example if someone told you you'd won a a million dollars in a lottery you would feel overwhelmed. At work you might have so much to do, you would feel powerless/ overwhelmed because you may not know which task to begin first.

Hello Biko, - to be charged by extra tasks is a way to understand it . -but in this sentence " you look" refers to an expression the speaker received on the person's face and it means here 'being overcome by emotions '. It could be emotions of surprise or any other emotion that was triggered by an immediate sensory stimulation.

Overwhelmed mainly means excited. :)

It means you where charge of too many task.

Hi there, as far as I know, being 'overwhelmed' usually refers to the state of being pressured by too many tasks/problems than one can handle at the same time.