Is this a culture swab test we are talking about?
Normally the culture will 'grow' by 1-3 days and hence a positive determined in this time. However to call it a negative they need to wait until day 4-6 or so to be confident.
If we are talking PCR test, then its a slip of paper that says detected or not detected.
This doesn't provide much clarity I'm afraid.
Their online portal is messy at best. I've seen things show up on Sundays and not gotten calls until later in the week (both for my herpes testing and a yeast culture I had through them once). They will call if it is positive yes, but if I were you I'd just give them a call in the morning. If you need to be called you will show up on someone's list to do so on Wednesday. When they get to that relies on a lot of other factors. They tell everyone who is experiencing sytpms and being tested to abstain from sex until cleared.