Last night around 11pm I had a stomachache. I was very nauseous. Today around 6pm I vomited when I smelled food. I feel fine. No fever. I'm confused.

Keep an eye on it. Assuming you're not pregnant (morning sickness?) I'd advise you to keep on eye on your progress, drink plenty fluids & eat small meals as tolerated. You'll probably feel better without further therapy. If not, then get checked. Hope that helps. .