You do have some of the symptoms of MSA-C. I was diagnosed in May of 2011 first with an atxia (Muscle dysfunction in hip) which caused me unable to lift up my right leg more than an inch or so which was noticed plus low conductivity from EMG on right side. Next the symptoms when from NOH to gastroparesis and chronic constipation (enema’s weekly). Your neurologist needs to run a tilt test to check from NOH and an EMG at least before ruling out other diseases like MS. Good Luck I hope you don’t have MSA. Took me 30 minutes to type this and I am not confined to a wheelchair because I am week and I fall often.