Now that you mention it, it does sound like a hypoglycemic episode.
This happened to me a week or so ago. I've never fainted in my life. I was standing in the yard chatting with a neighbor lady, I had to reach out to her to keep from falling. She helped me get inside and gave me a cola. A few minutes late I was ok but weak for several hours.
Maybe, it's a type of fainting virus. LOL