Foolish mistake several years ago with cannabis.

I made a foolish mistake and smoked some at a cabin with friends, since I do not partake, not since high school, I forgot about it and a month later applied to a school bus driver position. Tested positive and was denied. I never began the Training program, did not fill out the application and never drove anything other than my car. My question is, how do I check the Federal DOT for any negative marks if any? The site I went to, FMCSA.DOT.GOV is asking that I enter a commercial learner's permit. to view my records. The reason I need to check is that I will be applying to a new job that is associated with the FAA and was told that I would need to pass a DOT screening. That is the one and only time when I have ever come up positive in a UA. If I have a record , I am willing to take the process of DOT-qualified SAP. I have not smoked since then, nor do I plan to. Thank you for any advice and my apologies if this is not the correct sub.