8 dpo wanting to test

I'm 8 days post ovulation (per glow) AF is scheduled to show in 6 days and I am trying so hard not to test.
I've been having periods of nasusea and mood swings  this week but no other symptoms. 
I don't want to test early to get another negative and get upset but this wait is killing me!
When do you guys think I could test?

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