What should I ask my doctor to test? Neurological problem?

Keep a journal, explain what you have told us here. They will probably want to do a ct or mri and maybe an eeg. Very expensive stuff. You need to see a neurologist but probably will not get to one without a referral. Has anyone seen the seizure you had? That would help. How about family health history? That may lend a clue. Good luck, start with your doctor first and see what he/she thinks.