You're asking me to repeat "You can safely let it go" in different words. Did you think I might have changed my mind?
;-)
So its safe to never think of this again?
Welcome to the HIV forum.
There is little or no risk here. HIV is difficult to transmit by oral sex, and all known oral sex transmission events involved fellatio (oral-penile contact). HIV has never been known to be transmitted by cunnlingus (oral-vaginal sex). And although HIV isn't rare in the Caribbean, it isn't all that common in sex workers there; and when a sex worker insists on condom use, it usually means she knows she doesn't have HIV and intends to stay negative. So it is unlikely your partner had HIV.
Finally, your negative test result is reassuring, even if done a little early. Based on risk, you did not need HIV testing at all. You can safely "let it go".
Happy holidays-- HHH, MD