I advise NO treatments until you know what is wrong. Personally I would pop in to see your local Homeopath, who will sort out EXACTLY what you need to ease your illness. Nux vomica is a common prescription for nausea and grumpy mood. In the meantime, you can try sucking or nibbling on crystallized Ginger (magnificent for crook guts) and my favourite is a teaspoon of Angostura Bitters in a little water. Drink quickly and that will stimulate your digestive juices amazingly well. If you DO vomit - that is usually the best way to end the misery.