I have been fighting a pain that sounds EXACTLY like what you have dealt with. I've seen multiple neurologists, orthopedists, physical therapists, etc, and no one can tell me the source of the pain. MRIs, EMG, and X-rays all come back completely normal, but the sharp, stabbing, electric pain persists. I'll have long stretches of time where I exhibit no symptoms and you can even press around on the leg and it's perfectly fine. Then, all of a sudden, BAM! In those times, I can't touch my leg and it will hurt for (seemingly) no reason at all. It's in the exact same area as you described.
Did you ever make any strides in recovery? Any updates? Anything you could share would be very, very much appreciated!!!