WIC baby shower question

Brittany • Thomas Eugene 👶🏻💙 Baby #2 coming soon! (Hopefully)

So where I live the Women’s Infants and Children’s office (WIC) has a baby shower for all pregnant women in the area that r on wic and tonight I decided to take a closer look at the invite as I just hung it on the fridge after looking at the date and time when it came in the mail it’s tomorrow and I’ve been looking forward to it all week and it says at the bottom in very tiny print to RSVP by the 16th and I didn’t notice that before hand cuz the print is so tiny does anyone know if I should still be ok to go I’m going to call them in the morning as soon as I get up but I hate to say it but I’m litterally loosing sleep cuz im worried they will turn me down cuz I didn’t rsvp