I read others sxs of the same and finally able to describe what I am going thru. I have Multiple Sclerosis as well. THose words describe exactly what I am experiencing. My Neurologist questions whether I am having Syncope/fainting spells or near fainting. I don't know. It even happens without movement at times. I feel like I am dying when this happens it is so scary. Looking for anyone to chat with that experiences this as well. Hope I am reaching the right forum group. Please befriend me if u can relate.