I didn't want to start a new thread, so I'll post the update in here...
I spoke to the neurologist, who was rather cold, impatient and borderline dismissive (I have no insurance and had to set up a payment plan, but I endured that feeling of being treated like I wasn't human because they don't believe they'll be getting paid for seeing me..) and brushed off any talk of anxiety, fibromyalgia, pinched nerve, etc. He arranged for me to have an MRI with contrast and an MRA to check for MS, ministroke or aneurysm (having those done was a nightmare.. the hospital wanted almost $2,000 and I had to again set up a payment plan, but they almost didn't want to do the scans) and both came back clear. I still have no idea what is wrong with me. It's still very much a struggle.
And now I've developed slight tingling in that arm, just the past day or so, probably because I strained it considering the muscle is very sore. But I have some sort of stomach virus or food poisoning and have also been nauseous off and on for about twenty-four hours now... and my HA is acting up terribly because while I can easily and rationally deduce what the cause is, the paranoid side of me is just taking the tingling arm and lingering nausea and my fight or flight reflexes are telling me I'm having a heart attack. I see my GP next week, so I just need to try and hold on until I can talk to her about everything.
Thank you so much for your replies, everyone. I hope you're doing well, Eiri-- so strange that we're both going through this and we're both 23. I was on celexa at one point as well.