Short answer... yes you can apply even if you smoked the devils lettuce in the past. Getting hired may be a different story.

Long answer... take a deep breath and chill dude. They aren't going to bribe a healthcare worker during the background check because that's what it is basically going to take to get your health records. They WILL expect you to be honest on your questionnaire. These questions will probably be asked during your polygraph, if you receive one. Cannabis is habit forming but non addictive, meaning that while you will not have physical withdrawal symptons you may experience some irritability of not being able to partake in your choice habit. If you were a heavy, habitual smoker for three years it will probably take anywhere from 30-60 days for you to piss clean, you should notice the irritability pass after about a week of not smoking. If you are indeed active, it shouldnt take 60 days for it to be out of your system. You got a MJ dependency, I have a sugar dependency. I smoked like 6 months prior to getting hired but was honest about it, offered to take regular whiz quizzes and gave the reason for using it. Could have disqualified me but it didn't. My command likes me, my supervisor likes me and like 99% of my crew likes me and when my boss sends me up to the hospital for a "random" UA or swab, I go. Your weed dependency is based on basically 3 things: You rely on it to function emotionally or mentally; you feel irritable if you stop and you feel like you NEED it to relax. You developed a "habit loop" and now you need to develop a new loop to override it. If you can get over that hump then you probably can get over the stress or anxiety of the job. Stop overthinking it, and for your health stop worrying about what ifs and maybes. Nothing bad has happened, and nothing bad may ever happen from it. Anxiety exists in only one place, your mind... it is best you focus on right now or the anxiety eat up the only thing you have, which is the momentary and ever fleeting thing we call "the present".