I can only think of peppermint tea. You said you were nauseous, but are you actually vomitting? if you are maybe you could try some sports drinks, like gatorade, you don't want to get dehydrated and have to go to hospital, so if you could just sip on something like that?
Otherwise maybe you live close to a milk bar, and could manage to get up there for a split or something like it, but you are probably too sick for that too. I hope you are feeling better soon.