Hannah, My symptoms are similar to yours. I often have trouble walking and use a cane sometimes. John Hopkins suggested I get physical therapy to help. At the end of about my 3rd week of therapy I had what I call a "spell". I had slurred speech, foggy brain, dizzy and trouble walking. For the most part this cleared up after 30 minutes, but I had speech trouble for about 3 more days and trouble getting around. In therapy I cannot walk more than 4-5 minutes before I start shuffling my feet and need to stop. I usually always have a bad headache and feel nauseous when this happens. Normally my spells cause me to feel like I lost all of my strength and I am "out of it" for 20-30 minutes. These occur more often when I over do it. Air travel and long trips in the car also cause these spells. I have never fainted. Guy