What is a good illness excuse to get out of work that can last for a day?

I need to take off work today but i have to go back in wed. I am just worn out cuz they have me working so many hours and i have had this cough for a week now and its not getting any better but i feel like a regular cough is not a good excuse. so i need a good excuse. My eye is kinda red so i was gonna call in saying that i want to make sure i dont have pink eye OR ive had a cold or something for a while where i cough a lot so i was going to say i coughed til i puked this morning which can happen. Are those legit excuses? and what are some more excuses?