I'm sorry your neuro brushed you off like that! Maybe if you talked about the MS hug as a girdling sensation, and talked about the esophageal spasms, that language would be more what she might accept, as "MS hug" is really an informal way of talking about the girdling.
It's very good that you did get checked for heart problems, as we don't want to overlook something else that might be going on, but if indeed your heart checked out fine, then it is likely the spasms that the ER doctor talked about.
When you see your general practioner, you might want to ask him if he's willing to deal with whatever MS symptoms you have, bypassing the neuro altogether. I've had MS for 24 years now, and haven't seen a neuro for the last 11 or so. My family practitioner takes care of all my health needs, including anything relating to the MS. If she has questions, SHE calls a neuro and consults, then gets back to me, so I don't have to deal with a second doctor visit.
I've found that specialists (and a neuro is a specialist) really aren't all that interested, sometimes, in the day-to-day treatment of patients. Once they've made a diagnosis, they tend to dismiss patients and don't want to be bothered with routine stuff. Maybe this is where your gp can step up to the plate and not "bother" the neuro anymore?
...I am not a doctor, nor health professional, and don't pretend to be one, here.....