So a combination of say hiv rna at 11 days and a hiv 4th gen combo at 21 days both coming back negative makes it conclusive? any additional test need to be done?

Typical testing regimen is at 1 month (more than 28 days) and 6 months. If either is positive, you will be offered medications that reduce the viral load in your bloodstream. You should talk to your Dr about using PrEP while you are waiting for results, and even if they come back negative. These prophylactic meds can prevent HIV infection during high risk encounters.