Since you most likely did not get the Public Trust classification in a few months, it’s more likely you were approved to work (ATO - authorization to operate) while the process continues. An SF85P is usually for Moderate Risk Public Trust (MRPT) positions and can take some time to get through the system, including a personal interview. At the non defense agency where I work, my team all filled out our SF85P forms in Oct 2017. We all got ATO within 2 weeks, so we’ve been working ever since. 2 of us got interviewed in June 2018 and 1 just got interviewed 2 weeks ago (Jan 2019).