Customer grabbed me at work today and I had a panic attack and broke out in hives

For context, I work seasonally doing Easter photos at a mall.

Today was showing a customer her photos, and she couldn’t make up her mind and continuously switched up what photos she wanted printed vs. in digital format for over 20 minutes. She was all over the place and I was doing my best to understand her and suggest the best way to select to save money and to fit within our packages. She was getting frustrated because she kept changing her mind. I reached my hand out to gesture to the screen to confirm her photo selections and she grabbed my hand in anger. In that moment, it happened so fast that I didn’t fully process it until later, but I shot her the dirtiest glare I could, and I could see in her face that she knew she crossed a line. I was so stressed that I took a 5 minute break after and the stress took over and I broke out into this nasty rash I get when I’m extremely anxious. I ended up leaving work 2 hours early because I was so overwhelmed.

I know in hindsight I should have shut it down and kicked her out, but I literally was so overwhelmed in the moment.