Which two phrases in this sentence from Paragraph 2 add to the tone of this passage?

As I tiptoed to look out the window, I caught a glimpse of my stricken expression in the hall mirror and valiantly tried to swallow my terror.

"stricken expression" and "swallow my terror"

"tiptoed to look out the window" and "caught a glimpse"

"in the hall mirror" and "valiantly tried"

"look out the window" and "tried to swallow"