Sudden, Sharp Pain on Upper Left Side of Head? Seeking Advice

71-year-old male . Looking for insight into a sudden and puzzling issue I've been having.
About two weeks ago, I started experiencing sharp shooting, electric-shock feeling pain on the upper left side of my head, roughly 5 inches above the ear. The pain is isolated to this exact spot and doesn’t start at the base of the head. Along with the pain, the scalp in this area becomes sore to the touch and feels warm. The sensation extends to the body, but temperature returns to normal after the pain subsides.
This is the first time I've had pain like this, and it started suddenly on July 31, 2024. Now it occurs multiple times a day. During these episodes, the pain is excruciating (10/10), and I’ve had head jerking and body jolts due to the shock-like sensation.
I went to the ER almost daily from July 31 until August 5, when they admitted me due to the frequent visits. They treated me with various medications, including:
- Gabapentin 300 mg
- Tramadol (37.5 mg) + Paracetamol (325 mg)
- Codeine Phosphate 10 mg + Paracetamol 500 mg
- Ibuprofen (400 mg) + Paracetamol (325 mg)
- Indomethacin
A Neurologist did a physical exam and ordered MRI and MRV scans of my head, which came back clear. The neurologist suggested it might be a migraine and prescribed Gabapentin 300 mg (twice a day) and Indomethacin 25 mg (three times a day) for the next 7 days. The pain is intermittent, occurring every 8 to 24 hours or so, and continues until the painkillers take effect.
I’m baffled by how this issue appeared suddenly and continues for the past two weeks. Has anyone experienced something similar, or do you have any suggestions on what might be causing this and what I should do next?