I HAVE A BUTTERFLY IN MY STOMACH

I don't feel comfortable...feels like that there's something in my stomach.....it is used when one is sick or nervous...

butterflies in the stomach
害怕得发抖, 神经质的发抖

应该是：我已经害怕得发抖了。

To have butterflies in your stomach means to feel very nervous about doing something.

"to have butterflies in your stomach" 意味着你对做某事感觉到紧张。

心慌.做某事前紧张

在我的胃有一只蝴蝶

我很紧张.