Do what Libs do and just take the day off and dont even bother to tell anyone. Maybe let people know by them following you on Facebook or other social media as you post what u ate for lunch or what u did that day i.e go to the mall and have a day out eating and drinking and shopping then go to a concert that night or hockey game and post all about it
When u come back to work and your employer asks you where you were and why you didnt let them know why you didnt come to work tell your employer you were so sick you couldnt even lift the phone.