Rocking in a chair at work and pacing are sort of “normal” stims (as in, they’re not uncommon among people who aren’t autistic), so I can definitely see how you wouldn’t really notice them. Do you rock or pace to self-soothe when you’re anxious, stressed, sad, or even happy or excited? That’s the biggest thing that differentiates autistic stims from non-autistic stims.
I was standing when I was rocking back and forth, and had anxiety issues.