What kind of sickness was this?

A long time ago, I was having a normal day when suddenly my head started spinning. I was extremely dizzy. I decided to sit outside with my parents to get some fresh air. They were talking about food and it made me nauseated. I asked them to stop. But it was too late. I rushed to the bathroom and vomited. That’s when things got really bad. I got this very strange sensation that my stomach was going to explode. Now, I’ve felt anxiety before. I know it can make you feel like your heart will explode. But this wasn’t that. This was something biological. I actually asked my parents to take me to a hospital because the sensation so... otherworldly. They never took me, though.

For the next week or so, I had to lay down and stay perfectly still or else I would get dizzy and projectile vomit. Any time I had to get up and walk, it was... strange. Whatever sickness I had, had changed my body language. I was walking with this strange, zombie-like gait that was unnaturally slow and stiff like a prototype robot. My sister said it looked like I was on my way to kill someone. And I just couldn’t walk normally. It was weird.

Well, that was that and my symptoms went away after a week or so. But it was weird. I’d never had a sickness like that before. What was it?