I have similar issues with a nerve pain that radiates from my chest down my arms. It only happens when I'm profoundly distressed so I believe it is a conversion symptom but I don't believe I have conversion disorder. It just goes along with dissociation, I think, rather than being an independent disorder. (Although I haven't read the new DSM-5 so I can't be certain of that.)

I also have some neurological damage from a stroke many years ago so in my case it would be literally impossible to rule out physical causes for my symptoms.

I would try to learn grounding techniques for when you feel yourself begin to dissociate with the hope that you can reduce the frequency of this problem. I wish you healing.

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