I wish he understood!

Does anyone else's boyfriend/husband get upset that your having morning sickness a lot?? My man has been upset cause I've been so sick and I can't go to work. I feel useless but I can't seem to get out of bed and go to work.. has anyone had this problem with them not understanding?? I try to tell him I can't work that I'm gonna throw up on everyone but he just doesn't get it!! How do I make him understand??