Personally white is the best belt, no expectations, no pressure. And when you pull something advanced off it's like an "OH SHIT!" Moment. I always thought Jiu Jitsu is a journey of self discovery and not about rankings. You seem entirely focused on the rank than anything else. The fact you haven't stated who your instructor was doesn't give me a positive thought on the legitimacy of this thread. I maybe wrong and if so I apologise. But to me it seems you're looking to be ranked as a 10P BB without the hard work that comes with it. For what reason is purely speculation. As Brandon already stated, forget black, start from white again. Because of your condition medically I highly doubt any registering body will scrutinise you. All the best. Peace out