you may want to discuss an EMG (nerve conduction study) with your doctor(s) if you are having what in doctorspeak they call progressive neurological symptoms. in plainspeak it sounds like you have some nerve disorder and it's getting worse. if you haven't seen a neurologist (a doc who specializes in nerve disorders) you need to.
for your own records, document clearly exactly what your symptoms are, what muscle groups are affected (gluts, quads, hamstrings, calves, feet, for instance) whether you have any loss of sensation/feeling, and the history of your symptoms (pain has gotten worse, more intense, more frequent, weakness has gotten to teh point that you can't do xyz, twitches didn't start till x no months ago). also if you feel you have weakness you may want to measure your legs (calves, for instance) over time, to watch for atrophy (muscle wasting). the more information you have the more likely you will get the attention and workup you need.
good luck.