I have MS, and the one of the reasons MS is hard to regulate heat is because it also affects sweat glands and just about every other organ . I have swallowing issues and dry mouth as a result of my autoimmune. I didn't get the wedge pillow for my gerd right away, and couldn't feel my throat as I didn't realize that I was damaging it worse.
The autoimmune issue is causing the issues with the hormones transmitters and glands, as well as the resulting fallout trying to eat and getting issues in sinus, nose throat salivary glands etc.
Just saying that these could be after effects of something else, try to get to the cause. The MS treatment helps, but then i have to go symptom by symptom.
The good news is that as far as i can tell, there's a lot more medication approved for MS. treatments are organized and people understand and hrlp with the myriad of isdues that you seem to be facing. Doctors faced with these opportunities to diagnose, autoimmune, if they call it MS, will there be better outcome for the patient that all of the other crap.
Hopefully they can run the mri and look for lesions in spinal? Or you find whatever else is bothering you. Stress can be ms trigger, and surgery is stressful. Or could have been a mystery virus that MS is supposedly triggered by. Diabetes also can cause the similar swallowing and glad issuesand neuropathy because it's also autoimmune. Only get a diagnosis with treatments please 🤣
Good luck...