(not) know if/whether (you) are coming or going

to be unable to think clearly and decide what to do because you have so many things to deal with.

I had so much to do yesterday that I didn't know whether I was coming or going.

The recent changes in the school curriculum mean that most teachers don't know if they're coming or going.

• not take no for an answer
• not take something lying down
• not the end of the world
• not the half of it
• not think twice about
• not think twice about something
• not to be sneezed at
• not to be sniffed at
• not to mention
• not to mention someone
• not to mention something
• not to put too fine a point on it
• not to speak of
• not to speak of something
• not touch something with a ten-foot pole
• not touch with a ten-foot pole
• not to worry
• not trust an inch
• not trust someone an inch
• not turn a hair
• not with a bang but with a whimper
• not worth the paper is printed on
• not worth the paper something is printed on
• no two ways about it
• no two ways about it.