I was feeling guilty.

我感到歉疚。

《牛津词典》

Kids might end up feeling guilty, or resentful.

最后孩子自己感到负罪或者怨恨。

youdao

Talking about feeling hopeless or feeling guilty.

谈到感觉无助或者有罪恶感。

youdao

In other words, one of the reasons we cooperate with others is to avoid feeling guilty.

FORBES: The Neuroscience of Guilt Uncovers the Origin of Cooperation

And right now I'm feeling guilty because I've got a first draft that needs honing.

NPR: Grigsby Bates on Her New Mystery Novel

And so, as I listened to the tribute on the radio, I stopped feeling guilty and instead, I was proud.

FORBES: The Post I Swore I Wouldn't Write (Redux)