He’s not even rubbing his jaw. He has his hand over Wanda’s while holding Mjolnir’s handle. Superman is questioning if he will live and is being helped to his knees. Clearly Thor came to first.
Yes, he is.
Also Superman is just expressing "I'll live" sentiment. Not that 'I'll die".
He wasn't helped to his knees. The amount of spinning to turn this in favor of Thor is just ridiculous.