I have never heard the word pulse but I imagine it is very accurate.

Dictionary of English. Here is the definition. It seems the word has many different meanings, but none of them seem to fit into the meaning. Is it commonly used to mean beat beat? To make repeated beats do these include beating.

When will comes suddenly in you, often creative or reactive” would normally be “an impulse”.

The thesaurus yields a few alternative words, but I think the most suitable would be:

Grouchy,

hard to please.