should i call out

i work part time at a store. this is my first job, ive been working here since the end of september. before this ive only called out one time. this week i already requested a day off for my birthday, so i only was scheduled 2 days, sunday and friday. i have the flu bad, i developed bronchitis and have had a temp from 102-104. i called out sunday because i was vomiting nonstop and had horrible stomach pain. i have work tomorrow and don’t know if i should call out again or if they will be mad at me. but i’m very sick and most my customers are elderly and im afraid i will get them sick.