As already mentioned, from my experience medically DQ'd folks are usually treated well and if qualified allowed to transfer to the community of their choice (within reason). Do you have an interest in Intel, Supply, HR or anything else that Navy officers do? Getting trained up and experience in those jobs would help ease the transition to civilian life considerably. If you are limited from doing sea duty though the options may narrow considerably.
I am not too familiar with medical retirement but a good buddy from college was going to just be discharged by the Army before he fought it and got 70% medical retirement from them. I don't know the full details or how it works out with VA disability, but make sure you are well aware of your rights and options are if it comes to that.
@TimeBomb or others may have more details on that.