Overall, it is highly unlikely you have been infected or exposed.
The only possible concern would be if your partner was in the "window' period at the time he had his rapid OraQuck- That test may have a window up to 1-3 months.
Of the testing you had, the PCR RNA generally has a window of a couple weeks- so a test at 9 days is not definitive. The 28 day antibody test- likely has a sensitivity 90-95%.
So again, if you put all these negatives together- highly unlikely you are infected-
But If the partner had JUST been infected and was in the window, I suppose theoretically it is possible your PCR and antibody tests were done too soon to show up.. Unlikely but not impossible.
I would retest you at 3 months post exposure with an antibody test- If that was still negative, I would not do further testing and would reassure you further.
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