These are all forms of fidgeting in my opinion
Ants in your pants
Can't sit still
Got the jitters
Tapping on the table
Scratching your head
You got worms? ( my grandmother always used to ask me that) I still can't sit still for long. Granny it was a good thing.
Fidgeting might be good for your health according to an article at healthfinder.com referencing a British study. If you fidget you might find this article interesting, if you need to validate your fidgetness.