i might get fired on my 4th and 5th day of work😭😓

so i didn’t know i was suppose to work on saturday and today.. UNTIL i realized my schedule said i work Wednesday , Thursday , Friday , Saturday and Sunday. my first day was on wednesday. yesterday i was sick and got a bad anxiety attack so if i went to work i wouldn’t even go anyways because i was sick.

ummm my boss hasn’t called me yet . and tomorrrow im suppose to get my pay check. what should i do??????? What should i tell my boss ? that i forgot ? or

this girl i work with even said on saturday he changes the schedules . so im confused. and scared i might get fired .. 😩what’s a good reason other than “i forgot i was suppose to go in on Saturday and Sunday ?”😥😥😥😥😥im fairly new and im working at a fast food fast paced place.