Certainly dont give up until all avenues are exhausted. I know people that have overcome heart surgery, diabetes and all sorts of problems to have their medicals reinstated. One bloke I know suffered a very bad car accident in which he lost his face and his head was caved in to the extent that he has a metal plated skull. he suffered some pretty serious head trauma, but recently had his medical reinstated. Sure he has some limitations on it, but he got it back. I know another chappy that crashed an airplane and suffered some horrific burns to the majority of his body. he is flying again. Another guy I know stalled a super cub into the ground and broke his back. He learned to walk again and is now flying. There is hope mate, Don't give up.
Good luck with it.
