Am I really an idiot?

Went to a concert a few night ago. The venue is pretty big but absolutely packed. We got there early so we had to stand around and wait. I'm 10 weeks pregnant , got these tickets before I got pregnant but decided to go anyway. So it's sweltering hot in there like absolutely no air super stuffy. I see a row of tables with nothing blocking them so I sit down for a second to catch my breath because the heat is making me nauseated.

3 workers swarm me out of nowhere a d make a scene in front of everyone saying those are vip tables and I have no business sitting there, they are screaming at me and people are starting to look and laugh. I explain that I didn't know, and sat for a second because I was nauseated and dizzy. They kept yelling at me told me to go stand somewhere and walked away saying I was a fucking idiot to each other but everyone could hear so people are laughing at me. I wanted to cry.

Was it really that stupid of me?