Not know whether you’re coming or going
Definition 1 of 1
Pro Tip 1/3Metaphorical Use
The phrase is a metaphor suggesting someone is so confused they can't even tell basic directions. 
After the three-day music festival, I didn't know whether I was coming or going.
Pro Tip 2/3Emotional State
Often used to express being overwhelmed or stressed by life's demands. 
The city is so hectic that sometimes you don't know whether you're coming or going.
Pro Tip 3/3Informal Context
It's casual and best used in informal situations, not in formal or professional ones. 
Chatting with a friend, I sighed, 'I don't know whether I'm coming or going anymore.'