Need some advise

I've been sick with a fever and a sinus infection so I don't feel good at all and all my man thinks about is sex! I'm not in the mood at all its starting to make me really mad. BC when I tell him no I don't feel good he says is there someone else has any other women had this issue when sick? I kinda feel like he only thinks about himself and its not fair what should I do or how do I get him to stop til I feel better.