Hi, fellow citalopramer.
It's curious you said your headaches are around your left eye/temple area. My pain episodes (headache/migraine and something else) have always had that element in them. Odd pressure, scooping sensation around left eye/temple area, felt like an invisible spoon digging my eyeball out.. not exactly, but close enough.

I try not to view your experience through mine. For me going down in dose ended that pain. You said the quick drop made it worse. And you mentioned this headache proneness.. I've only had this happen while on citalopram.
So it started when you upped the dose and got worse again when you tried to drop. To me it sounds like your cns just might not enjoy all the changes. Drugs, doses.. So parroting the others.
Long slow tapers and as few switches as possible seems to work the best often. In some ways this reminds me a bit of Aberdeen from PP.. If I remember right she went c/t paxil into WD - tried different drugs, ended up staying on something not helpful (escitalopram or citalopram?) and then just riding it out and slowly tapering. She seems to be doing better now, still tapering but lower dose. Idk, it might not be the same, just came to mind.
Welcome and I wish you much healing.