Stomachache vs. Nausea

Robin • Founder of Diary of a Hopeful Woman, a project raising miscarriage awareness around the world. | 25/Ohio | TTC
Sometimes it's truly difficult to tell what I'm having when I don't feel good..
Past few days I've been nauseous, but I've been asked if its a stomachache or truly nausea.. I'm over here like, "uhh I'm on the verge of throwing up, you tell me."
Is there really a difference?