Hi. I have had the ssep. I had it after my first emg/nc showed little compared to my pain. That ssep is suppose to show more and did for me. I also had at that time my emg/nc repeated. At the time I had my ssep and the second nc/emg my pain was at an all time high. The first time I had the emg/ssep it was no big deal but because I was so sensitive later on and in horrible pain I had a harder time. The guys who did my second test at the neuro were so nice and tried to distract me. They kept checking in to make sure I was ok. You will be fine just use your voice and focus on that you need to do it to get some answers and then relief.
Fanfaire I freeze too in all exam rooms and docs office. Part of why I dread apts. When I get cold and my feet are blocks of ice it sends the pain up and it is so hard to warm up.
Good luck and many thoughts.Welcome too