First of all, everything I said is 100% true. I never said there weren't exceptions. If you go to studentdoctor.net, or allnurses.com, you will see that some of the most popular threads on there are one of the following: how to get into med school with an arrest/unsavory background/academic misconduct/similiar circumstance/A FAILING GRADE IN ONE CLASS ---or---How to get your nursing license (after you finish and pass nursing school) with a DUI/Drug charge/other arrest/too many parking tickets(not kidding)/or similiar circumstance. There is a common theme in all those hundreds of heartbreaking threads; there probably will be no exception for you, and its a cruel and rejection-filled process. Have you ever read the questions they ask for Police and Fire jobs? A pattern of Marijuana use (no harder drugs-remember they polygraph) is considered 3 or more times in the last 2 years. Do you want to attempt to be an exception, in a pool full of people that are qualified? While there are different circumstances for the medical field, the same competitiveness exists.
I work in the business, and have been for close to 10 years. I personally know exactly how things work. I am not saying this to get into a pissing match, but more to establish how we are giving advice here. If you think its no big deal to smoke weed (specifically to get arrested for it) and attempt to get into any of the things I mentioned then you are ignoring all kinds of evidence. Specifically HUGE pools of approved FF and Cop candidates who passed all vetting with no red flags. As far as nursing goes, some states make it a point to reject EVERYONE who applies for a license with a drug charge. Same goes with attempting to get your Medical Doctor's license. The point is not whether I think weed is bad or not (a visit to a thread in a cult you recently joined may show what I think about that) but its whats good counsel. I personally know how extraordinarily competitive it is to become a FF/Medic, Cop, Nurse, or Doctor, and can extrapolate that to a few other careers as well. And I promise you I have an accurate view of the matter. I'm attempting it personally right now.