I'm going to tell my girlfriend to stay home when she's sick
Why do you feel the need to tell your girlfriend to stay home when she's sick?
Everyone else gets to stay home and sleep when they're sick but my girlfriend refuses to do that.
I don't think there's anything wrong with you wishing your girlfriend to stay at home especially during the times that she is sick and unable to work. And I think it's noble of you to be worried and to be unhappy for her if she still wants to work instead of trying to get better. How about you take a day off yourself, and try to maybe stay with her at home if that would make her feel more at ease.
I'm going to do that so I can make sure that she rests and recovers.
It's great that you're so concerned about your girlfriend's health, and staying home to make sure she gets better is really kind. I'm sure she'll appreciate it.