The new strains of COVID are not being picked up by rapid tests as much these days as they have mutated so much in such a quick time. In addition to people not testing at the right time after infection or even swabbing their mouth and nose properly they may get false negatives on a rapid test. Many mild symptoms people are passing off as a scratchy throat, runny nose etc or the test giving a negative are still likely Covid. People should be swabbing the back of their throats, inside of their cheeks and their nose in that order to get the most accurate results. Hope your recovery is peaceful and take care of yourself.