Constant motion like that might be "psychomotor agitation" - I have a hard time sitting still when I'm not on my ADHD meds. Fidget a lot when I'm trying to concentrate too. The worst is getting up out of my chair every 10 minutes for no good reason because I can't stay on task. It's frustrating, but meds help.

You might want to look up diagnostic criteria for ADHD and see how well you can relate to them. If it seems worth pursuing with a doctor after that, make note of your symptoms and find out what they have to say.

Good luck!