Jessalyn, you said two different things. In the headline you said "feel sick," which can mean anything from ice cream headache to period to impending doom. In the body of your post, you said "going to be sick," which almost always means vomiting.

When someone says they're going to be sick, I will sometimes ask why and help them find a bathroom. I am relieved when they say it's because of drinking or a bad burger. When someone says they feel sick, I ask what their symptoms are. If they reply something other than nausea, I am relieved and offer sympathy and aspirin. If they say nausea, then see above. I like being relieved and dislike hearing the sound of retching.

Doug