Hi rewin! Is there any chance you could take your exam with whatever exceptions you would find helpful, based on your medical diagnosis? Such as an extention to get ready for it again, then extra time to complete it? I definitely think you should at least try to take it. You did so much hard work and came so close. If you get part way through and find yourself becoming overwhelmed, then you can always stop.
As for employment, what do you think? Would you like to try working? Would you rather try something part time, or less stressful?
Do not let others determine your future for you. You are more than just your diagnosis. Do what you feel comfortable with. Which may be more or less than what others will suggest for you.