Can you possibly be much further along than you think? From a previous sexual encounter? The Clear Blue Easy Early Detection test says you can test up to 5 days before your missed period, so that would be 9 days post ovulation. I really seems too early, at 5 days.
https://www.clearblue.com/pregnancy-tests/early-pregnancy-testing#:~:text=It%20is%20this%20hormone%20that,with%20any%20Clearblue%20Pregnancy%20Test.