Having Brain Aneursym. Pain In Upper Back Of Thigh With Weird Sensation Of Numbness. What Is Causing This Pain?

I have a brain aneursym that is in the circle of willis and wide based, the dangers of operating are same as bursting at this time because it cant be coiled, I have to have skulled removed, so I would either die in the process of be mentally and physically handicapped.That I have been coping with but now I have had over a year now extreme pain in my left upper back of thigh, it feels like contractions, bad contractions, and electrical stabbing, and burning which sometimes goes all the way to my feet. It has a weird sensation of being numb and when that leg is touched it is defiantely different from other leg, feels heavy and dead. I have fallen 3 times now the past month due to cant walk a lot and put pressure on it. I am wondering since I have a brain aneursym and even if I didnt have that do my symptoms sound like M.S. as I have gone for mris on back and leg and had nerve conduction tests and they all come out ok... I am in tears I just want to know whats going on and can deal with anything but not knowing what is causing this pain.. anyone have any ideas please thanks