Walking sets off leg pain off balance an disoriented weakness in left side arm an leg...why?

Many reasons: There are many reasons for these symptoms, especially given your multiple current medical conditions. See your physician for an evaluation. Keep a detailed log of the timing, duration, frequency, characteristics, and severity of these episodes and take it to your physician. http://www.nlm.nih.gov/medlineplus/ency/article/003174.htm