Anony Mous:
Due to my position in a local hospital (yes, that's where I work), I always got priority blood tests to back up positive quick tests, they always came back negative even though I've tested positive with the PCR test 3 times now. This is partially what is currently driving a 30-40% refusal rate for the vaccine amongst healthcare workers.
Now it may be that you work in a hospital, but that doesn’t automatically make you an expert on all COVID tests (potential argument from authority fallacy). But getting a false positive COVID test result would not be a valid motivation to refuse a vaccination (though valid motivations do exist).