Migraine for over 72 hours should I go to ER

Patient: I have had a severe migraine for more than 72 hours. I am in severe pain . Should I go to the emergency room?

Symptoms: Severe head pain, nasuea, sensitivity to light and sound,

Doctor: Thank you for writing to us.Having the worst headache of your life could be a Subarachnoid hemorrhage. Go to the ER and then get a CT scan done to rule it out. If the CT is clear, then you should get ok with Paracetamol or some stronger medication which your Doctor will prescribe it to you.Hope this helps you. All the best.