First Day at Work and Already a COVID Outbreak

I had my first day and my new job today , senior living home and I really like it ! everyone is super nice and laid back ! the residents are so sweet and inviting! BUTTTTTT... of course there's always a but..... my FIRST day there is a COVID outbreak in the living home....3 residents in lock down with COVID , lots of employees out with COVID including my boss who hired me 🤦‍♀️ now im having MASSIVE anxiety I'm going to get COVID for the 4TH TIME !!!!! like beyond freaking out ! everyone didn't seem so concerned...I don't.know if that's good or bad... I wore a mask the whole time washed my hands and hand sanitizer...ALOT. as soon as I got home I threw the clothes I was wearing in the wash and jumped in the shower. and they still let family visit ! uhhhhh why can NOTHING go right for me ??!! *sorry if this posted multiple times !!! it kept saying " post failed try again " 🤦‍♀️