Recent grad here. Is my drug usage too recent (17 months ago) for a security clearance? How detailed should I be?

Thanks for the response @willam-henderson @amberbunny. I just read some stuff on http://www.dod.mil/dodgc/doha/industrial/2016.html . The articles with people with prior drug use who were granted a security clearance were first issued an SOR before they got the clearance. Am I missing something here? Some people had less MJ usage than I did… Now I’m starting to freak out.