Welcome to HCM.
WHEN THEY TESTED FOR STDs THEY WOULD HAVE TESTED DEFINITELY FOR HIV
ALSO. If it would have a positive test you would have been notified. So you need not worry. Only thing it has to be repeated once again according to the time of your last unprotected contact. You have to get treated adequately for yeast infection.
Here afterwords try to follow protected sex to avoid unnecessary tension.
Wish you speedy recovery.