What do you recommend if i have a hangover and have felt nauseas without vomiting for about 17 hours?

Not unusual: With a severe hangover to have it last a day or more, but not usually longer. Firstly, don't drink so much that you get hung over. If you cannot control your drinking, you need help from professionals and should see a chemical dependency program. If your nausea continues after 24 hours or so, see a doctor. Stay hydrated, force yourself to take in adequate clear fluids (apple juice, jello, broths).