I think that this plays a pivotal role in whether or not the OP should appeal the decision or try to get his record expunged. Form 4473 does ask (11e) "Are you an unlawful user of, or addicted to, marijuana or any depressant, stimulant, narcotic drug, or any controlled substance?"

Technically, you could truthfully answer "no" in this case because "are you" implies "now" and not "at some time in the past".

But since the form only spells out a misdemenor offense specifically for domestic violence as being something for which you can be denied, I think that the OP is okay here.

Unless of course, the OP still uses said controlled-substance for "recreational use". In that case, he used it before and uses it now, so there might be some grey area as to how truthful he was when he answered question 11e.