I’ve always been dropped before I even had to show up anywhere (dad worked for the county, knew too many judges), but I would try going to your OB & see if they’ll write a note for you saying you can’t go (or even your kid’s pediatrician). I work in healthcare & my OB was more than happy to write a note that I couldn’t work overnight shifts & I couldn’t work more than 8 hour shifts when I was pregnant. Pretty sure she would’ve done the same for me post-partum.