Hey Nicole!!!
It is nice to hear from you again despite the circumstances. Ok I am not sure about your question, well I understand your question but I am not sure about an answer, but.............due to the fact that many of us with MS cannot regulate our body temperatures, it seems reasonable to me if your body temp went up even a few degrees, that your body could respond by vomiting. As warm blooded creatures, we do not tolerate temperature swings in either direction of more than one or two degrees without it affecting us. Anyway, that is my take on it.
Now, what do you do about it? Why were you over heated? What can you do to prevent it in the future? Work on that so you don't have to have that horrible experience again.
How are you feeling a couple of weeks post surgery? I hope you are feeling better. Let us know.