I'm an anuersym clip, 20 years ago, clip is close to my brain stem. Otherwise healthy 64 year old woman. Over the last couple of years it is becoming increasingly hard to keep my balance while walking. I have fallen a couple of times getting up in the middle of the night. Basically I stagger like a drunk when I walk and cannot take long strides or large steps. I have gained 20 lbs because it is kind of hard to exercise like I used to. Last thing is I wake in the middle of the night with numb tingling fingers.