Not with the FBI, since they won’t even give you an interview. Maybe with someone else.
Have you started the process? Fairly certain one of the first steps are a few yes/ no questions, with the drug policy being one of them. Quick and easy way to weed out a bunch of people, full pun intended.
I would remain dope free and apply in 37 months. Mark it on your calender and give another month. Don’t hide usage prior. Be honest. You have to want this and be willing to live in their rule set.