Chronic headache with abrupt onset 1 year ago, most recent s/s dilated left pupil and pinpoint right pupil. Had CT, MRI/MRA without/with all neg within last month. Last 2 days increased pressure with stabbing pain to left eye, not able to sleep more than 3 hours r/t pain, increased N/V and feel coordination is off when walking. Have appt with neuro-optho and neurologist in 10 days, do I need to go to ED or wait?