What happens if I don't throw up?

I am feeling sick in my stomach the past two days. I kinda feel like throwing up sometimes, but sometimes I don't. Even if I did throw up it would mostly be water, ginger ale and some bread I ate today, so I don't see how my body is rejecting that, as I was feeling sick yesterday. So if I don't throw up will my body eventually fix itself? Any tips on the fastest way to feel better? (Ps. I've had plenty of water, gingerale and pepto bismal)