I feel your pain. My husband tested positive on a home test yesterday. Going to pharmacy today to get a test, not the PCR test, but the antigen test.
We are supposed to fly to London tomorrow, July 4 and cruise out of Southampton on July 8. We don't know exactly when his symptoms started as he's been dealing with linger effects from bronchitis from early June.
I doubt he will get a negative by Thursday (would give us enough time to fly there). Plus also we have the Health Questionnaire to deal with which asks if anyone in the party has been positive in the last 10 days.
The ironic thing is that he feels better now than he did when he had full blown bronchitis.