just recheck...no harm doing it. at least you won't live to regret (for not rechecking) later in life...
two years ago i got 10A1 and 1A2 in BM and i rechecked, coz i always did consistently well in school.
they sent the results in less than 2 weeks...(erm...efficient or didn't even bother rechecking?) go figure...
anyway, the results remain the same...

**off topic** 5C and above is Credit right?