Very anxious about phone free show

Hey folks I bought tickets for a phone Free show, and am super super anxious about it because I use my phone to communicate via emergency chat because in crowded venues everything that everyone is saying sounds like the adults in a peanuts cartoon to me, (I also use my phone to pair with a medical wearable that yells at me through my phone if I'm at a sustained elevated heart rate so I don't pass out and know to sit my butt down). I was wondering if anyone had experience working with the yondr people on exceptions because I had a terrible experience the last time I was at a show with the pouches and passed out and couldn't communicate with EMS because I couldn't hear anything anyone was saying because it was the auditory version of potato salad mixed with alphabet soup.