I have parkinsons, early onset, and for the past few weeks I have been having these episodes where after sitting fior a while and then walking a sort distance (50-100 feet) my legs give out on me and I ve fallen a couple of times. It s not light headed, the doctors have checked my standing and sitting blood pressure, and it s not like my feet are getting stuch, kike typical parkinsons. Could I be having strokes or ms? I m beginning to get worried.