Would this make me a bad teacher

I got diagnosed with strep Saturday. I've been on antibiotics but my throat is still killing me..I have tried to call it for tomorrow. I have sick days. I'm allowed to use them and I feel horrible. My principal keeps guilting me saying we don't have any subs and even if we can get one we are getting closer to testing so we don't need a rando in the class right now. I literally can't talk. I feel so sick and she keeps saying this is what I signed up for as a teacher. My students need me. I have been a teacher 2 years and never use my sick days because I get guilted. I passed out last year and had to be taken to the hospital. I decided to call in even though I feel terrible. I teach 8th grade language arts. Would I be a bad teacher to have all my classes just do independent reading time? Each of my classes are 47 minutes and I have no voice