No, that makes no difference. You could have been injured stepping on the bus at MEPS (the only requirement is that you are on orders for 30 days or more or injured at drill or AT). If unfit, you should either be retired or receive separation with severance pay.
It sounds like they have already pushed forward with your discharge. Please e-mail at my personal e-mail (jadm71@yahoo.com), provide me the details (copies of paperwork, to include LOD, and discharge notification, preferably scanned) and you unit commanders rank, name, office telephone, and e-mail (if you have it). I will forward this info to the Reserve/NG Coordinator at the Army Physical Disability Agency. I need to be clear, if you want to forward me the information, I will be acting in my personal capacity and not as an attorney as we have no attorney-client relationship.