I have no idea what it could be from. Sounds to me as if you should go to another neurologist, not associated to the other doctors. I have had 4 EMG's done and nothing like that has happened. I have heard said that an EMG is only as good as the doctor performing it. So, maybe she did something wrong.
I am not real big on our health care system at all. I have had some strange experiences myself. I quit seeing one neurologist because while he was doing an EMG on me he started ranting and raving about something to do with his wife going to a Gynecolgist and the doctor told her she needed a hysterectomy and while he is going on about this he is getting louder and louder, besides his office never seemed very clean to me.
Then I told him that I checked him out and he did not even belong to the American Medical Association and then he started ranting and raving about them (I waited until he was done with the EMG of course)
He started cursing about how they are out to get your money Blah, Blah... So, I told him he is the oddest specialist I ever met and that for his patients he owes them to be registered. Then he said that most neurologist had mental issues. Obviously I could see that he did.
Anyway,I don't want to bore you with the rest but every appointment I had with him, he was different and weird, and his office always seemed dirty to me.
So, now I drive 3 hours to Chicago just to get decent medical care. The docs around here have a lot to be desired. Maybe you could find a university hospital as I did. They seem much better to deal with.
Anyway, I hope you find out soon what is going on, because as most of us know on this board it is so, so hard to cope with agonizing pain on a daily basis. Just put one foot in front of the other and take one day at a time.