When I was having mine implanted I do remember (through the haze of sedation) being asked if I could feel the sensations and I told him that I could feel it in my stomach and upper body.....next thing I knew he had it in my legs. Sounds awful what you had to go through and Im not surprised that you turned off your stim in case you got shocked again.....
I do hope they can rectify whatever it is that is going on in there
Jackie