Some books recommend labeling feelings/emotions. E.g., that it's a good idea to put a name on a negative feeling, so it'd be easier to deal with it.

Labeling doesn't do anything.

Feelings are too complex of a phenomenon to describe them with some words. But that's not even the main point. The main thing is that feelings are to be felt not labeled.

The whole labeling process implies that emotions can be intellectually understood, described, and then sorted into folders for reference.

There's no point in trying to find a label - the feelings can be experienced without it - I'm sure everyone agrees with it. So, feel the feeling, and don't worry about the name.

K.