I am a 27 year old male and four days ago started having a pounding headache. I feel the vein/artery pulsing in my left temple and it is visible to others. The pain is so bad I can't get out of bed or do daily functions. I went to the ER, they did a CT scan which was clean and my sed rates were normal. I was prescribed percocets, they aren't helping even a little bit. I had left over loratabs from a back injury, took a couple of those with no help either. Over the counter medicines such as ibuprofen, advil, alieve etc. with no help. Should I go get an MRI or MRA?

Also, I have no nausea, no eye or neck pain, no sinus issues. Pain gets worse when I stand up, bend over or just move in general. Please help!