So, I'm only not a 'close contact' for a covid case by SA Health guidelines because positive colleague said symptoms started on monday and theres 2 days prior.

https://www.sahealth.sa.gov.au/wps/wcm/connect/public+content/sa+health+internet/conditions/infectious+diseases/covid-19/testing+and+tracing/close+contacts

I feel like reluctance to do covid testing on a weekend is not taken into account here, but eh