Your number one priority right now is to get your ducks in a row, for the Gun Board Meeting. If at all possible get a letter from your doctor, and from your shrink in your favor, stating that your medications are in order. Also pointing out that you are not a danger to yourself or others, and that carrying a firearm concealed will not interfere with your medical issues.
As for OC'in, it is completely legal to OC, a firearm that is LEGALLY registered to you! Their are many restrictions on OC w/o CPL. READ READ READ, all of the stickies. You should also talk to a lawyer before the meeting, not necessarily take one with you (unless you can afford it), but at least speak with one, so you know what to expect.
Peace be with you and your piece!
***IANAL*** (I An NOT A Lawyer)