Haha, yeah I always figured that would be most accurate time to do it - and if it had only happened once I would just assume that I probably did have it and the subsequent PCR was wrong. After the second time though.. I don't know what to think really.
@Rod_Munch you might find this interesting!
https://www.express.co.uk/life-style/health/1496895/covid-test-false-positive-drinks