You can usually apply for a new NTS a few days after scores are released. I would check on the site, and see if you can apply for another NTS. Yes, you can still apply for your REG NTS, even though you cannot take it again in the same testing window. The NTS should state the earliest you can take the exam, which would be the next testing window.
For instance, I failed AUD in Q4, and applied for an NTS on 12/11/2019, the earliest I could take AUD was 01/01/2020, and the NTS expired on 06/30/2020. This information should be available once your NTS once you apply and receive it.
AUD - 84
BEC - 82
FAR - 76
REG - 79
What a journey! It took me 12 attempts, do not give up, keep going! Praise God!
Passed Exams: 8/25/2020
Licensed in Pa: 11/24/2020