I Am Nauseous And Having Heaves But Nothing Comes Up.

I am nauseous and having heaves but nothing comes up. This started only 15 minutes ago, though. About 30 minutes ago I ate two peaches and an avocado. I have these foods for snacks often. And I've had peaches from this batch earlier this week. Seems to be subsiding as I type, though. But I'm not quite sure it is over.